Hacker gets talking to his other favourite presenter, Carol Kirkwood, and the topic of discussion is... who has the best knees in tennis? Watch this clip and find out who Carol picks!

For more Wimbledon clips, check out our CBBC at Wimbledon playlist:    • Playlist  

For more fun, CBBC games and great makes visit http://www.bbc.co.uk/cbbc/

CBBC aims to encourage children to find out more about existing interests and inspire them to develop new ones; helps them understand the world around them and provides an entertaining watch when they just want to relax.

70% of 712 year olds now go online most days in the week too. Unique browsers to the CBBC website currently stand at over 915,000 per week.

The majority of our output is UKmade, reflecting children's lives in the UK today. Popular programmes on the channel include Wolfblood, The Next Step, Friday Download, Diddy Movies, Four O'Clock Club and The Dumping Ground. It's possible to catch up on CBBC shows on the CBBC iPlayer at http://www.bbc.co.uk/iplayer/cbbc