Question: Known for his speed and agility along with being client to agent Roman Grill, who plays a attacking midfielder football player? 
Context: Roman Grill (born March 1, 1966) is a German former footballer who is now a player agent.  A defender, Grill spent eleven years playing for Bayern Munich's reserve team, and made one first-team appearance, replacing Thomas Helmer in a UEFA Cup match against Benfica in December 1995.  Bayern went on to win the competition that season.  After retiring, Grill worked as a coach with Bayern's youth team, before starting his own player agency in 2006.  His clients include Owen Hargreaves, Philipp Lahm and Piotr Trochowski. Zairo Anuar Zalani (born 18 June 1982) is a Malaysian football player currently plays for Terengganu City in the Malaysia FAM League.  Zairo plays mainly as central midfielder but can also play as an attacking midfielder.  He is known for having a powerful shot and has turned that into valuable goals for his teams. Gevorg Ghazaryan (Armenian: Գևորգ Ղազարյան ; born 5 April 1988) is an Armenian football player who mainly plays as an attacking midfielder and can also play up front.  He plays for the Armenian national team and currently plays in the Primeira Liga for C.S. Marítimo.  Ghazaryan has participated in 52 international matches, scoring 10 goals since his debut on 14 January 2007.  He previously played for Greek Super League clubs Olympiacos and Kerkyra, and earlier for Pyunik F.C. and the youth systems of Pyunik.  Ghazaryan is one of the prominent football players of Armenian origin. Josue Dos Santos or simply Valmir (born 11 April 1979) is a Brazilian football player.  He currently plays for Brusque Futebol Clube.  Valmir is a central midfielder who plays in the holding midfield role or as an attacking midfielder.  Despite often being used in a defensive position, he is mainly an attacking player. Yao Xia (Simplified Chinese: 姚夏; Pinyin: "Yáo Xià") (born 28 January 1974) is a Chinese football player and coach who is currently the caretaker manager of Chengdu Blades as well as also being a former international who predominantly played as an Attacking midfielder or Striker.  As a youngster he would make a name for himself with Sichuan Quanxing where due to his speed he was nicknamed Cheetah ("猎豹") by the fans.  After leaving the club he would settle within another Sichuan province football team with Chengdu Blades where he stayed for several seasons until he retired from playing. Ronaldo de Assis Moreira (born 21 March 1980), commonly known as Ronaldinho (] ) or Ronaldinho Gaúcho, is a Brazilian professional footballer and ambassador for Spanish club FC Barcelona.  He played mostly as an attacking midfielder, but was also deployed as a forward or a winger.  He played the bulk of his career at European clubs Paris Saint-Germain, Barcelona and Milan as well as playing for the Brazilian national team.  Often considered one of the best players of his generation and regarded by many as one of the greatest of all time, Ronaldinho won two FIFA World Player of the Year awards and a Ballon d'Or.  He was renowned for his technical skills and creativity; due to his agility, pace and Fumiya Kogure (木暮 郁哉 , Kogure Fumiya , born June 28, 1989) is a Japanese football player.  He currently plays for Hougang United in the S.League, Singapore's top tier of competitive football.  Kogure had played previously for several clubs in Japan, including Albirex Niigata, Mito HollyHock and Azul Claro Numazu.  He plays primarily as a holding central midfielder, but can also be deployed as a winger or attacking midfielder when required. Marko Marin (Cyrillic: Марко Марин); born 13 March 1989) is a German professional footballer who plays for Greek club Olympiacos as an attacking midfielder and left winger.  He is known for his acceleration, dribbling, agility, creativity, versatility, technical skill and playmaking ability. Piotr Artur Trochowski (] , ] ; born 22 March 1984) is a German professional footballer who plays as an attacking midfielder and is currently unattached to a club.  According to his FIFA World Cup 2010 profile he is a playmaker known for "his speed, agility, tricky dribbling and refined technique." Joona Veteli (born 21 April 1995) is a Finnish football player currently playing for Norwegian OBOS-ligaen side Fredrikstad.  Veteli plays in the position of centre midfielder but can also operate as an attacking midfielder, defensive midfielder, right-back and winger.
Answer: Piotr Trochowski