Andy Murray joined John McEnroe for a unique training session on a race track before the start of Wimbledon next week.
The British No 1 is hoping to repeat his 2013 title win in this year's tournament and McEnroe, a three-time Wimbledon winner, has backed Murray to challenge for the trophy.
In last week's Wimbledon draw, Murray was handed a first round match against fellow Brit Liam Broady, and defending champion Novak Djokovic could lie ahead if he reaches another final.
Murray warmed up with his fifth title win at the Aegon Championships, but also swapped the grass for concrete while sharpening up his serve with McEnroe.
The American offered a high speed target as Murray demonstrated his accurate serving in different surroundings.
Click on the video to see McEnroe's thoughts on Murray's title bid and their unique training session.
Check out our daily live blog from the All England Club on skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis.
By purchasing a Sky Sports Day Pass for £6.99 or Sky Sports Week Pass for £10.99, you can enjoy access to all seven Sky Sports channels and watch on a TV with a NOW TV Box or on a range of devices.