After Rafael Nadal lost at the French Open yesterday, I talked with several people who dismissed Tommy Haas as a potential threat to Roger Federer in their match today. In third set, though, the score was 6-7, 5-7, 3-4, 30-40 on Federer's serve, Haas had a break point to serve for the match, and I was thinking, "See, Haas is a dangerous, canny veteran!"
On that break point, Federer ran around a backhand and drilled a crosscourt forehand, a shot he'd been missing all day—but this one went in, and Federer proceeded to win the next nine games, and then the match in the fifth set: 6-7, 5-7, 6-4, 6-0, 6-2.
All I can say is, "Roger, don't do that to me again in the next three rounds!" :-)