• Olivier Giroud playing around in the crowd at the O2, tennis coach Brad Gilbert (L) seems unimpressed
  • Heather Watson watches the action at the ATP World Tour Finals at O2 Arena
  • Bob and Mike (R) Bryan celebrate yet another victory in the doubles
  • Novak Djokovic walks out for his men's singles match against Juan Martin Del Potro
  • Novak Djokovic wins the first set but is pegged back in the second
  • Del Potro takes it into a decider with some big hitting forehands
  • But it's Djokovic who takes the win and a place in the semi-finals
  • Roger Federer gets some close attention from a cameraman during his match with Richard Gasquet
  • Federer puts the pressure on the Frenchman as he looks to bounce back from an opening defeat
  • Gasquet just cannot get to grips with Federer
  • And Federer takes it to keep his chances of making the last four alive
  • Fans following Federer but also British fans lending support to the injured Andy Murray

ATP World Tour Finals - Day 4

Olivier Giroud playing around in the crowd at the O2, tennis coach Brad Gilbert (L) seems unimpressed