Question: When did the person with the highest number of assists in UCL history go to Manchester United?

full_context: Document 1: List of UEFA Champions League hat-tricks: Rank Player Hat - tricks Cristiano Ronaldo 7 Lionel Messi Mario Gómez Filippo Inzaghi Luiz Adriano 6 Adriano Sergio Agüero Karim Benzema Andy Cole Didier Drogba Samuel Eto'o Robert Lewandowski Roy Makaay Michael Owen Marco Simone Andriy Shevchenko Roberto Soldado Ruud van Nistelrooy
Document 2: Cristiano Ronaldo: Most career goals in Europe's top six leagues: 400 goals Most goals scored in all UEFA competitions: 158 goals Most matches won in the UEFA Chanpions League: 100 wins Most goals scored in UEFA club competitions: 123 goals Most goals scored in the UEFA Champions League: 120 goals Most assists in the UEFA Champions League: 34 assists Most goals scored in a UEFA Champions League / European Cup season: 17 goals in 2013 -- 14 Most goals scored in the UEFA European Championship, including qualifying: 29 goals, for Portugal Most goals scored in UEFA European Championship and European FIFA World Cup qualifiers: 50 goals Most UEFA Best Player in Europe awards: 4 (2008, 2014, 2016 and 2017) Most goals scored in European World Cup Qualifiers: 30 goals Europe's all - time leading international goalscorer: 85 goals
Document 3: Cristiano Ronaldo: Cristiano Ronaldo Cristiano Ronaldo with Portugal at the 2018 FIFA World Cup Full name Cristiano Ronaldo dos Santos Aveiro Date of birth (1985 - 02 - 05) 5 February 1985 (age 33) Place of birth Funchal, Madeira, Portugal Height 1.85 m (6 ft 1 in) Playing position Forward Club information Current team Juventus Number 7 Youth career 1992 -- 1995 Andorinha 1995 -- 1997 Nacional 1997 -- 2002 Sporting CP Senior career * Years Team Apps (Gls) 2002 -- 2003 Sporting CP B (0) 2002 -- 2003 Sporting CP 25 (3) 2003 -- 2009 Manchester United 196 (84) 2009 -- 2018 Real Madrid 292 (311) 2018 -- Juventus 0 (0) National team Portugal U15 9 (7) 2001 -- 2002 Portugal U17 7 (5) 2003 Portugal U20 5 (1) 2002 -- 2003 Portugal U21 10 (3) Portugal U23 (2) 2003 -- Portugal 154 (85) Honours (show) Men's football Representing Portugal UEFA European Championship 2004 Portugal 2012 Poland & Ukraine 2016 France FIFA Confederations Cup 2017 Russia * Senior club appearances and goals counted for the domestic league only and correct as of 19 May 2018 ‡ National team caps and goals correct as of 30 June 2018
Document 4: European Cup and UEFA Champions League records and statistics: Cristiano Ronaldo holds the record of most assists in the competition with 37 assists. James Milner holds the record of most assists in one season: 9 assists in the 2017 -- 18 season. Three players finished twice at the top of the assists list (including joint top): Kaká in 2004 -- 05 and 2011 -- 12. Lionel Messi in 2011 -- 12 and 2014 -- 15. Neymar in 2015 -- 16 and 2016 -- 17. Two players provided four assists in one match: Zlatan Ibrahimović for Paris Saint - Germain against Dinamo Zagreb on 6 November 2012. Neymar for Barcelona against Celtic on 13 September 2016.
Document 5: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: [kɾiʃˈtjɐnu ʁoˈnaɫdu]; born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Italian club Juventus and captains the Portugal national team. Often considered the best player in the world and  widely regarded as one of the greatest players of all time, Ronaldo has a record-tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 29 trophies in his career, including six league titles, five UEFA Champions League's, one UEFA European Championship, and one UEFA Nations League. A prolific goalscorer, Ronaldo holds the records for most official goals scored in the UEFA Champions League (126), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 700 senior career goals for club and country.
Document 6: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (395), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 670 senior career goals for club and country.
Document 7: European Cup and UEFA Champions League records and statistics: Ryan Giggs holds the record of most assists in the competition with 42 assists (29 GS, 2 R16, 7 QF, 2 SF, 2 F), all with Manchester United. Cristiano Ronaldo holds the second place of most assists in the competition with 40 assists (25 GS, 9 R16, 3 QF, 2 SF, 1 F), 10 with Manchester United and 30 with Real Madrid.
Document 8: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (395), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 650 senior career goals for club and country.
Document 9: European Cup and UEFA Champions League records and statistics: Rank Player Season Goals Cristiano Ronaldo 2013 -- 14 17 Cristiano Ronaldo 2015 -- 16 16 Cristiano Ronaldo 2017 -- 18 15 José Altafini 1962 -- 63 14 Lionel Messi 2011 -- 12 6 Ferenc Puskás 1959 -- 60 12 Gerd Müller 1972 -- 73 Ruud van Nistelrooy 2002 -- 03 Lionel Messi 2010 -- 11 Mario Gómez 2011 -- 12 Cristiano Ronaldo 2012 -- 13 Cristiano Ronaldo 2016 -- 17
Document 10: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (Portuguese pronunciation: (kɾiʃ'tjɐnu ʁuˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has four FIFA Ballon d'Or awards, the most for a European player, and is the first player in history to win four European Golden Shoes. He has won 24 trophies in his career, including five league titles, four UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in the top five European leagues (372), the UEFA Champions League (107) and the UEFA European Championship (29), as well as the most goals scored in a UEFA Champions League season (17). He has scored more than 600 senior career goals for club and country.
Document 11: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (Portuguese pronunciation: (kɾiʃˈtjɐnu ʁoˈnaldu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has five Ballon d'Or awards, the most for a European player and is tied for most all - time. He is the first player in history to win four European Golden Shoes. He has won 25 trophies in his career, including five league titles, four UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in the top five European leagues (373), the UEFA Champions League (114), the UEFA European Championship (29) and the FIFA Club World Cup (7), as well as most goals scored in a UEFA Champions League season (17). Cristiano also holds the record for most official assists provided in the UEFA Champions League (36). He has scored more than 600 senior career goals for club and country.
Document 12: Cristiano Ronaldo: Cristiano Ronaldo GOIH, ComM Ronaldo at the 2017 FIFA Confederations Cup Full name Cristiano Ronaldo dos Santos Aveiro Date of birth (1985 - 02 - 05) 5 February 1985 (age 32) Place of birth Funchal, Madeira, Portugal Height 1.85 m (6 ft 1 in) Playing position Forward Club information Current team Real Madrid Number 7 Youth career 1992 -- 1995 Andorinha 1995 -- 1997 Nacional 1997 -- 2002 Sporting CP Senior career * Years Team Apps (Gls) 2002 -- 2003 Sporting CP B (0) 2002 -- 2003 Sporting CP 25 (3) 2003 -- 2009 Manchester United 196 (84) 2009 -- Real Madrid 270 (286) National team 2001 Portugal U15 9 (7) 2001 -- 2002 Portugal U17 7 (5) 2003 Portugal U20 5 (1) 2002 -- 2003 Portugal U21 10 (3) Portugal U23 (2) 2003 -- Portugal 147 (79) Honours (show) Representing Portugal UEFA European Championship Winner 2016 France Runner - up 2004 Portugal 2012 Poland & Ukraine FIFA Confederations Cup 2017 Russia * Senior club appearances and goals counted for the domestic league only and correct as of 23: 00, 22 October 2017 (UTC). ‡ National team caps and goals correct as of 22: 40, 10 October 2017 (UTC)
Document 13: Cristiano Ronaldo: Cristiano Ronaldo GOIH, ComM Ronaldo at the 2017 FIFA Confederations Cup Full name Cristiano Ronaldo dos Santos Aveiro Date of birth (1985 - 02 - 05) 5 February 1985 (age 32) Place of birth Funchal, Madeira, Portugal Height 1.85 m (6 ft 1 in) Playing position Forward Club information Current team Real Madrid Number 7 Youth career 1992 -- 1995 Andorinha 1995 -- 1997 Nacional 1997 -- 2002 Sporting CP Senior career * Years Team Apps (Gls) 2002 -- 2003 Sporting CP B (0) 2002 -- 2003 Sporting CP 25 (3) 2003 -- 2009 Manchester United 196 (84) 2009 -- Real Madrid 265 (285) National team 2001 Portugal U15 9 (7) 2001 -- 2002 Portugal U17 7 (5) 2003 Portugal U20 5 (1) 2002 -- 2003 Portugal U21 10 (3) Portugal U23 (2) 2003 -- Portugal 145 (78) Honours (show) Representing Portugal UEFA European Championship Winner 2016 France Runner - up 2004 Portugal 2012 Poland & Ukraine FIFA Confederations Cup 2017 Russia * Senior club appearances and goals counted for the domestic league only and correct as of 23: 00, 3 June 2017 (UTC). ‡ National team caps and goals correct as of 22: 40, 3 September 2017 (UTC)
Document 14: List of Real Madrid CF records and statistics: The club currently holds the record for the most European Cup / UEFA Champions League triumphs with 12, and the most La Liga titles with 33. Also Real Madrid is the most successful club in international titles with 23 more than any team in the world. The club's record appearance maker is Raúl, who made 741 appearances from 1994 to 2010; the club's record goalscorer is Cristiano Ronaldo, who has 413 goals in all competitions.
Document 15: Cristiano Ronaldo: Cristiano Ronaldo GOIH, ComM Ronaldo at the 2017 FIFA Confederations Cup Full name Cristiano Ronaldo dos Santos Aveiro Date of birth (1985 - 02 - 05) 5 February 1985 (age 32) Place of birth Funchal, Madeira, Portugal Height 1.87 m (6 ft 2 in) Playing position Forward Club information Current team Real Madrid Number 7 Youth career 1992 -- 1995 Andorinha 1995 -- 1997 Nacional 1997 -- 2002 Sporting CP Senior career * Years Team Apps (Gls) 2002 -- 2003 Sporting CP B (0) 2002 -- 2003 Sporting CP 25 (3) 2003 -- 2009 Manchester United 196 (84) 2009 -- Real Madrid 277 (289) National team Portugal U15 9 (7) 2001 -- 2002 Portugal U17 7 (5) 2003 Portugal U20 5 (1) 2002 -- 2003 Portugal U21 10 (3) Portugal U23 (2) 2003 -- Portugal 147 (79) Honours (show) Representing Portugal UEFA European Championship Winner 2016 France Runner - up 2004 Portugal 2012 Poland & Ukraine FIFA Confederations Cup 2017 Russia * Senior club appearances and goals counted for the domestic league only and correct as of 15: 00, 23 December 2017 (UTC). ‡ National team caps and goals correct as of 22: 40, 10 October 2017 (UTC)
ground_truth: 2003
sub_queries: who has the highest assist in ucl history Answer: Cristiano Ronaldo
when did Cristiano Ronaldo go to manchester united Answer: 2003