Jo-Wilfried Tsonga trades racket for ball boy challenge

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.