9 November 2012 Last updated at 19:35 GMT

Jo-Wilfried Tsonga trades racket for ball boy challenge

Barclays ATP World Tour Finals

  • Venue: O2 Arena, London
  • Date: 5-12 November

Coverage: BBC TV: One singles match each day live; BBC Radio: Every singles match live on 5 live sports extra; BBC Sport website: One singles match each day streamed online, live text commentary on every singles match

French tennis player Jo-Wilfried Tsonga takes time out from the ATP World Tour Finals to learn the basics of being a ball boy.

The world number eight is chasing a semi-final spot when he takes on US Open and Olympic champion Andy Murray on Friday evening.

Novak Djokovic reached the semis on Friday afternoon after defeating Tomas Berdych 6-2 7-6.