Márquez was Guardiola's first-choice at centre back along with captain Puyol for the 2008–09 season. On 13 December 2008, Márquez played his 200th match for Barcelona in their 2–0 win against Real Madrid. On 28 April 2009, during Barcelona's 2008–09 Champions League semi-final match against Chelsea, Márquez sustained a knee injury which required surgery, meaning he would miss the remainder of the season. Barcelona would go on to complete a historic treble after winning the Champions League final 2–0 against Manchester United.