Roger Federer, Rafael Nadal and Amelie Mauresmo played like champs and former winners Serena Williams and Martina Hingis also advanced during a hectic afternoon at the US Open.
A day after rain prevented any matches from being completed for the first time since 1987, virtually the whole tennis world was on display at Flushing Meadows on Wednesday.
Former Open champions Lleyton Hewitt, Marat Safin, and Andy Roddick won in straight sets.
Roddick's 6-3, 7-6 (3), 6-3 win over Kristian Pless of Denmark was yesterday's only second-round match.
Maria Sharapova, the 2004 Wimbledon champion, and Roddick have been the subject of gossip. He turned 24 and she was asked whether she'd bought him a present.
"Is it his birthday?" Sharapova responded. "I had no idea."
With 80 matches across the grounds, the upsets were quite limited, with the biggest probably 2004 French Open champion Anastasia Myskina's 6-4, 6-2 loss to Victoria Azarenka of Belarus.
The top-seeded Federer rebounded from a startling loss two weeks ago to overwhelm Wang Yeu-tzuoo of Taiwan 6-4, 6-1, 6-0. Aiming at his third straight Open title, Federer had won 55 straight matches on North American hard courts before Andy Murray beat him at the Cincinnati Masters.
"I thought I was always in control, obviously," Federer said after his victory. "I always said I prefer to be the favourite rather than the underdog.