WIMBLEDON, England—This one meant so much to Andy Roddick.

Because of the stakes: a return to Wimbledon’s semifinals. Because of the opponent: 2002 champion Lleyton Hewitt. And because of the circumstances: a five-set grind that began under a bright sun and concluded in shadows, 3 hours, 50 minutes later.

When it was over, having finally figured out a way to get past Hewitt 6-3, 6-7 (10), 7-6 (1), 4-6, 6-4, Roddick let out a sigh and raised a fist, then threw his racket down, sat in his changeover chair and covered his face with his hands.

“A mixture of happ...

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