MELBOURNE, Australia (AP) -- For all their Grand Slam successes, Venus Williams and Roger Federer still find themselves surprised to be in the semifinals at the Australian Open.
Injuries, illness and advancing age can do that to the best of athletes, even 17-time major champion Federer and seven-time Grand Slam singles winner Williams, who has overcome an energy-sapping illness and is playing some of her best tennis since being diagnosed with Sjogren's syndrome in 2011.
"I have a lot to give, I have a lot to give to the game. I feel like I have a lot of great tennis in me," Williams said when asked why she didn't retire when diagnosed with the illness that also causes joint pain.
"So anytime you feel that way, you continue. It's just the excitement of having the opportunity to compete at my best level."