• Roger Federer makes his entrance ahead of his clash with Juan Martin Del Potro
  • The Swiss unleashes an early forehand
  • Del Potro has to stretch on his forehand side...
  • ...before dipping into his box of tricks..
  • ...en route to a victory that takes him into the semi-finals.
  • Federer congratulates his opponent on joining him in the last four.
  • Former Tottenham defender Ledley King looks on.

ATP World Tour Finals - Day 6

Roger Federer makes his entrance ahead of his clash with Juan Martin Del Potro