Question: Who was the manager when the team that employed Ryan Bertrand won Champion's League?

full_context: Document 1: David Luiz: After starting out at Vitória, he moved to Benfica, remaining with the club for five seasons (three complete). He joined Chelsea in January 2011, winning the UEFA Champions League and the FA Cup during the 2011 -- 12 season, followed by the UEFA Europa League the following season. In June 2014, he transferred to Paris Saint - Germain for a fee of £50 million, a world record transfer for a defender, and won all four domestic competitions in both of his seasons in French football. He returned to Chelsea in August 2016 in a £30 million transfer deal.
Document 2: List of FA Community Shield matches: Manchester United hold the record for the most victories, winning the competition 21 times since its inception. They also hold the distinction of having the most appearances (30) and most losses (9). Although the Shield has had its share of historical moments -- from Eric Cantona's first career hat - trick in 1992, to Manchester United's first loss of 1999 ending a streak of 33 consecutive games without a defeat -- it has been dismissed as a ceremonial friendly that is not on par with other domestic honours in terms of prestige. Winning the Shield has proven to be an unreliable indicator of success in the forthcoming season. Since the establishment of the Premier League in 1992, only seven clubs that won the Shield proceeded to become League champions in the same season, the last being Manchester United in 2010 -- 11. Indeed, Gianluca Vialli was sacked only weeks after guiding Chelsea to the victory in the 2000 match, following a lacklustre start to the season. The current holders are Arsenal, who defeated Chelsea in a penalty shootout after a 1 -- 1 draw in the 2017 edition.
Document 3: England national football team manager: Swedish coach Sven - Göran Eriksson became the first foreign manager of the team in January 2001 amid much acrimony; he helped the team to three successive quarter - finals in major championships. Italian manager Fabio Capello replaced Steve McClaren in December 2007, after England failed to qualify for Euro 2008. Capello's side endured a lacklustre performance during the 2010 World Cup, but the FA confirmed that he would remain in the role. However, Capello resigned in February 2012, following a disagreement with the FA over their removal of John Terry's captaincy. He was replaced, on a caretaker basis, by Stuart Pearce, before Roy Hodgson was named as Capello's permanent replacement in May 2012. Hodgson's contract finished on 27 June 2016 as England were knocked out of UEFA Euro 2016 by Iceland in the round of 16. Sam Allardyce was announced as his successor a month later, but subsequently left the role after just one competitive match. He was replaced on a caretaker basis by England under - 21 coach and former England international defender Gareth Southgate, whose position was made permanent after four matches.
Document 4: Anthony Grant (English footballer): Grant began his career at Chelsea, progressing through the youth ranks before making his first-team debut in 2005. Grant was loaned out four times during his time at Chelsea; briefly playing for Oldham Athletic in 2006, before spending the 2006–07 season at Wycombe Wanderers. He then joined Luton Town on loan in November 2007, spending a month with the club. Grant later joined Southend United in January 2008, on loan until the end of the 2007–08 campaign. He signed for Southend on a permanent basis ahead of the 2008–09 season, and spent four seasons with the club. In June 2012, Grant signed for Stevenage on a free transfer. After one season at Stevenage, Grant joined Crewe Alexandra. He remained with Crewe for two years, and moved on to Port Vale in June 2015. He was voted Port Vale's Player of the Year in 2015–16, before being sold on to Peterborough United in January 2017. He was bought by Shrewsbury Town in August 2018.
Document 5: Cesc Fàbregas: Fàbregas came through La Masia, Barcelona's youth academy, leaving at 16 when he was signed by Premier League club Arsenal in September 2003. Following injuries to key midfielders in the early part of the 2004 -- 05 season, he went on establish himself in the team. He broke several of the club's records in the process, earning a reputation as one of the best players in his position, and won the FA Cup in 2005. After a protracted transfer saga, Fàbregas left London on 15 August 2011 to return to Barcelona in a deal worth up to £35 million. During his three - year spell at the Camp Nou, Fàbregas played alongside Xavi and Andrés Iniesta and won a La Liga title, the Copa del Rey, the FIFA Club World Cup, the UEFA Super Cup and two Spanish Super Cups. He returned to London in June 2014 to Arsenal's cross-town rivals Chelsea for a fee of £30 million, and in his first year there he helped to secure League Cup and Premier League triumphs.
Document 6: Chelsea F.C.: In July 2003, Bates sold Chelsea to Russian billionaire Roman Abramovich for £140 million. Over £100 million was spent on new players, but Ranieri was unable to deliver any trophies, and was replaced by José Mourinho. Under Mourinho, Chelsea became the fifth English team to win back-to-back league championships since the Second World War (2004–05 and 2005–06), in addition to winning an FA Cup (2007) and two League Cups (2005 and 2007). After a poor start to the 2007–2008 season, Mourinho was replaced by Avram Grant, who led the club to their first UEFA Champions League final, which they lost on penalties to Manchester United.
Document 7: List of Chelsea F.C. managers: Name Nat Tenure Honours Ted Drake England 1952 -- 1961 1955 First Division 1955 FA Charity Shield Tommy Docherty Scotland 1961 -- 1967 1965 Football League Cup Dave Sexton England 1967 -- 1974 1970 FA Cup 1971 European Cup Winners' Cup John Neal England 1981 -- 1985 1984 Second Division John Hollins England 1985 -- 1988 1986 Full Members Cup Bobby Campbell England 1988 -- 1991 1989 Second Division 1990 Full Members Cup Ruud Gullit Netherlands 1996 -- 1998 1997 FA Cup Gianluca Vialli Italy 1998 -- 2000 1998 Football League Cup 1998 UEFA Cup Winners' Cup 1998 UEFA Super Cup 2000 FA Cup 2000 FA Charity Shield José Mourinho Portugal 2004 -- 2007 2013 -- 2015 2005 Football League Cup 2005 Premier League 2005 FA Community Shield 2006 Premier League 2007 Football League Cup 2007 FA Cup 2015 Football League Cup 2015 Premier League Guus Hiddink Netherlands 2009 2015 -- 2016 2009 FA Cup Carlo Ancelotti Italy 2009 -- 2011 2009 FA Community Shield 2010 Premier League 2010 FA Cup Roberto Di Matteo Italy 2012 2012 FA Cup 2012 UEFA Champions League Rafael Benítez Spain 2012 -- 2013 2013 UEFA Europa League Antonio Conte Italy 2016 -- 2018 2017 Premier League 2018 FA Cup
Document 8: Ryan Bertrand: Born in Southwark, London, Bertrand began his youth career at Gillingham, before signing for Chelsea in July 2005. He graduated from Chelsea's youth system and was sent on loan to various clubs between 2006 and 2010. He made his full debut for Chelsea on 20 April 2011, six years after joining them, in a fixture against Birmingham City. In the 2011–12 season, Bertrand signed a new four-year contract with Chelsea and was made understudy to Ashley Cole, whom he described a "fantastic role model." On 19 May 2012, Bertrand became the first player to make his Champions League debut in the final, starting in an unfamiliar left wing role in front of Cole; Chelsea beat Bayern Munich 4–3 on penalties. He has honours with Chelsea, including an FA Cup and UEFA Champions League titles.
Document 9: Alex Ferguson: Sir Alexander Chapman Ferguson CBE (born 31 December 1941) is a Scottish former football manager and player who managed Manchester United from 1986 to 2013. He is regarded by many players, managers, and analysts to be one of the greatest and most successful managers of all time.
Document 10: Derek Saunders: Saunders was a member of Chelsea's 1954-55 Championship-winning team. He was one of only two players to play in every game that season. Saunders' position meant that he rarely scored goals, but he scored a crucial one against West Bromwich Albion to put Chelsea 3-2 ahead after they had trailed 0-2; they eventually won 4-2. He stayed with Chelsea for a further four seasons, though they were unable to repeat their title success. He featured in the first Chelsea side to play in a European competition, the Inter-Cities Fairs Cup in 1958. A year earlier, he had played for the representative London XI side in the same competition. He made 223 appearances for Chelsea, and scored nine goals. Upon leaving the club in 1959, Saunders became the Head Groundsman at Vincent Square, the central London playing fields for Westminster School.
Document 11: Alex Ferguson: Sir Alexander Chapman Ferguson CBE (born 31 December 1941) is a Scottish former football manager and player who managed Manchester United from 1986 to 2013. He is regarded to be one of the greatest and most successful managers of all time.
Document 12: Chelsea F.C.: Chelsea Football Club is an English professional football club in Fulham, London, that competes in the Premier League, the top division of English football. The club has won six top division titles, eight FA Cups, five League Cups, four FA Community Shields, two UEFA Europa Leagues, two UEFA Cup Winners' Cups, two Full Members' Cups, one UEFA Champions League, and one UEFA Super Cup.
Document 13: 1985–86 Chelsea F.C. season: It was the first season under the management of John Hollins, who had previously been a member of Chelsea's victories in the 1970 FA Cup Final and 1971 European Cup Winners' Cup Final. On 1 January 1986 Chelsea were second, two points behind leaders Manchester United and in March the club were still in second, four points behind Everton with two games in hand. The two games in hand were lost 4–0 at home to West Ham United and 6–0 away at Queens Park Rangers. After gaining just 9 points from a possible 33 in the last 11 games, Chelsea finished 6th for the second season in succession.
Document 14: Premier League Manager of the Season: Season Manager Nationality Club Ref 1993 -- 94 Ferguson, Alex Alex Ferguson Scotland Manchester United 1994 -- 95 Dalglish, Kenny Kenny Dalglish Scotland Blackburn Rovers 1995 -- 96 Ferguson, Alex Alex Ferguson (2) Scotland Manchester United 1996 -- 97 Ferguson, Alex Alex Ferguson (3) Scotland Manchester United 1997 -- 98 Wenger, Arsene Arsène Wenger France Arsenal 1998 -- 99 Ferguson, Alex Alex Ferguson (4) Scotland Manchester United 1999 -- 2000 Ferguson, Alex Alex Ferguson (5) Scotland Manchester United 2000 -- 01 Burley, George George Burley Scotland Ipswich Town 2001 -- 02 Wenger, Arsene Arsène Wenger (2) France Arsenal 2002 -- 03 Ferguson, Alex Alex Ferguson (6) Scotland Manchester United 2003 -- 04 Wenger, Arsene Arsène Wenger (3) France Arsenal 2004 -- 05 Mourinho, Jose José Mourinho Portugal Chelsea 2005 -- 06 Mourinho, Jose José Mourinho (2) Portugal Chelsea 2006 -- 07 Ferguson, Alex Alex Ferguson (7) Scotland Manchester United 2007 -- 08 Ferguson, Alex Alex Ferguson (8) Scotland Manchester United 2008 -- 09 Ferguson, Alex Alex Ferguson (9) Scotland Manchester United 2009 -- 10 Redknapp, Harry Harry Redknapp England Tottenham Hotspur 2010 -- 11 Ferguson, Alex Alex Ferguson (10) Scotland Manchester United 2011 -- 12 Pardew, Alan Alan Pardew England Newcastle United 2012 -- 13 Ferguson, Alex Alex Ferguson (11) Scotland Manchester United 2013 -- 14 Pulis, Tony Tony Pulis Wales Crystal Palace 2014 -- 15 Mourinho, Jose José Mourinho (3) Portugal Chelsea 2015 -- 16 Ranieri, Claudio Claudio Ranieri Italy Leicester City 2016 -- 17 Conte, Antonio Antonio Conte Italy Chelsea 2017 -- 18 Guardiola, Pep Pep Guardiola Spain Manchester City
Document 15: Frank Lampard: Frank Lampard OBE Lampard with Chelsea in 2008 Full name Frank James Lampard Date of birth (1978 - 06 - 20) 20 June 1978 (age 39) Place of birth Romford, London, England Height 1.83 m (6 ft 0 in) Playing position Midfielder Youth career 1994 -- 1995 West Ham United Senior career * Years Team Apps (Gls) 1995 -- 2001 West Ham United 148 (24) 1995 -- 1996 → Swansea City (loan) 9 (1) 2001 -- 2014 Chelsea 429 (147) 2014 -- 2015 Manchester City 32 (6) 2015 -- 2016 New York City FC 29 (15) Total 647 (193) National team 1997 -- 2000 England U21 19 (9) 1998 England B (0) 1999 -- 2014 England 106 (29) * Senior club appearances and goals counted for the domestic league only.
ground_truth: Roberto Di Matteo
sub_queries: Ryan Bertrand >> member of sports team Answer: Chelsea
who was manager when Chelsea won champions league Answer: Roberto Di Matteo