30 January 2014 Last updated at 08:49 GMT

Andy Murray concerned by 'slippy' Davis Cup court

Andy Murray says the players are struggling to adapt to the "slippy" court in San Diego where Great Britain will play the USA in the Davis Cup.

The Wimbledon champion, who reached the quarter-finals of the Australian Open earlier this month, says the clay court in San Diego presents a very different challenge to those found in Europe, but hopes to use it to his advantage.

Coverage of Great Britain's Davis Cup tie against the USA begins on Friday at 19:00 GMT on BBC Three.