The Championships at Wimbledon

In addition to Frazier, here are five other players unlikely to act their advanced age at the U.S. Open, which begins on Aug. 28.

Rip Tide

Bored and restless in retirement, Pete Sampras is playing World Team Tennis, but it's not a comeback

Could Roger Federer finally beat a certain Spaniard? Could Amélie Mauresmo master her nerves on the biggest stage? Both players delivered their answers-forcefully-at Wimbledon

It took startling transformations--from callow prodigy to thoughtful champion, from punk to philanthropist, from conflicted son to devoted father--for Andre Agassi to finally see the big picture, and he's still...