• Rafael Nadal and Roger Federer prepare for their semi-final clash at the ATP World Tour Finals
  • Footballer Juan Mata of Chelsea watches the action at the O2 Arena in London
  • The Spaniard sucks on an energy drink before battle commences
  • Federer looked to get his backhand working early on ...
  • ... but the French and US Open champion soon opened up his ferocious forehand to take the opening set
  • The 17-time Grand Slam champion thinks about changing his game plan at the changeover ...
  • ... while Nadal puts on a new headband as he prepares for the second set
  • He breaks twice more to seal a comfortable 7-5 6-3 victory in the latest instalment of his epic rivalry with Federer
  • The 13-time Grand Slam winner shakes hands with the six-time winner of the event
  • Bob and Mike Bryan celebrate victory in their men's doubles semi-final match against Alexander Peya and Bruno Soares
  • Novak Djokovic walks out for his singles semi-final match against Stanislas Wawrinka in the night session...
  • The Serbian was stretched in the early stages of the match...
  • However it was Wawrinka who began to feel the strain as the first set wore on.
  • The Swiss lost five successive games at one point, much to his obvious frustration
  • Djokovic would go on to record a straight sets victory and set up a Monday showdown with Nadal for the title.
  • Chelsea's Brazilian defender David Luiz certainly seemed happy about the prospect of the top two in the world going toe-to-toe.

ATP World Tour Finals - Day 7

Rafael Nadal and Roger Federer prepare for their semi-final clash at the ATP World Tour Finals