'Coach williams' is a possibility

Tennis great Serena Williams on Wednesday said she would consider coaching after calling it quits - but admitted she is not sure she would be any good.

The American, now 32, is often asked about retirement, even though she is in some of the best form of her life and shows no sign of slowing down.

Martina Navratilova recently said Williams could challenge Steffi Graf's Open-era record of 22 Grand Slam titles. Williams is currently gunning for an 18th major to match Navratilova and Chris Evert.