Professional athletes spend their whole lives preparing to win. They're expected to throw themselves physically and emotionally into their sports, fighting with all they've got to the finish. They're also expected to be cheerful and good sports, even when they lose. Yesterday, at the US Open, one loser had the nerve to do something that sportswriters hate. After her loss to Justine Henin, a very sullen Serena Williams addressed the press. Do we expect too much from our sports heroes? Doug Robson, who writes on tennis for USA Today, has more on the hoopla surrounding Williams' dour mood.