By Piers Newbery
BBC Sport at Wimbledon
Roger Federer opened play on 'People's Sunday' with an impressive performance against Sweden's Thomas Johansson.
The defending champion came through what had looked a tricky match with ease, winning 6-3 6-4 6-3.
Federer was soon in control, a superb half-volley giving him a break in game six that was enough for the first set.
A huge forehand gave Federer a break to lead 4-3 in the second set, and he took Johansson's serve apart to love for a decisive 3-2 lead in the third.
"I'm very pleased because Johansson was much more dangerous than the other two guys I've played," said Federer.
"I'm happy to win in straight sets because it wasn't that easy."
Second seed Andy Roddick produced a superb display on Court One to beat fellow American Taylor Dent and reach the fourth round.
Roddick continued his fine run against his countrymen - he has lost once in his last 18 matches against Americans - as he won 6-3 7-6 (8-6) 7-6 (7-1).
"I thought I played well, I lifted my game," said Roddick.
"I felt like I had good control on my serve. I had to concentrate hard because in that type of match you can't afford to get busted.
"I feel that I have the chance to beat anybody if I serve well."
Federer and Johansson earlier walked out to rapturous applause at the early start time of 1100 BST.
With 11,000 tickets on sale on the gate, and Tim Henman due on second, the Centre Court was half-full an hour before play.
"The atmosphere was different, really nice. The people were just happy to see some tennis I think," said Federer.
And the world number one gave the crowd plenty to enjoy, dominating against the 2002 Australian Open champion without ever hitting absolute top form.
Johansson held his own for much of the match but could conjure only two unconverted break points, and increasingly found himself beaten from both the baseline and the net.
Federer was happy to mix up his game, sometimes staying back despite a solid serving display, and with more gears to find the champion still looks the man to beat.
He goes on to face Ivo Karlovic in the last 16, with Lleyton Hewitt possibly waiting in the quarter-finals.
"I'm feeling better than last year because I've already won this tournament," said the Swiss, "so I now I know can do it."