Gladys Knight on how she 'loves tennis like crazy'

Gladys Knight tells BBC Radio 5 live's Philip Studd at Indian Wells how she loves the game "like crazy".

Knight describes how she was encouraged to play tennis by her brother Bubba and expresses her admiration for the "graceful and classy" Roger Federer, as well as discussing the evolution of the game in the modern era.

The "Empress of Soul" even concludes the interview with an impromptu sing-along featuring Studd and Times tennis correspondent Neil Harman.

Click here to see live coverage details of the Californian tournament on Radio 5 live Sports Extra.