In the sport of tennis, which player won the Barclays ATP World Tour Finals in 2011? Andy Murray, Roger Federer or Novak Djokovic?
The tournament was held at the O2 Arena, London, UK from the 20th to the 27th of November 2011. The singles title was won by Swiss tennis player Roger Federer.
Federer went into the ATP World Tour Finals as the defending champion having also won the tournament back in 2010.