Top seed Novak Djokovic
Top seed Novak Djokovic proved rock solid as he cruised past Germany's Florian Mayer 6-3 7-5 6-4 to reach the second round of Wimbledon Tuesday
The Serb broke 34th-ranked Mayer's opening service game and never looked troubled on Centre Court, wrapping up victory by swiping away a winning forehand.
Djokovic was back in action for the first time since losing a semi-final epic against Rafa Nadal at the French Open and looked sharp on the lush grass.
His next opponent will be an American in the form of either qualifier Bobby Reynolds or wildcard Steve Johnson.
Also Tuesday, Serena Williams began the defence of her Wimbledon title with a comfortable 6-1 6-3 victory over Luxembourg's Mandy Minella to stretch her unbeaten run to 32 matches.
The world number one, playing her first match since winning the French Open, scorched through the first set in 19 minutes, but was given a brief fright at the start of the second when she lost her serve to go 2-0 down.
The 16-times Grand Slam winner swiftly regained control, however, breaking in the very next game, before romping away with the match.
The American top seed will face France's Caroline Garcia in the second round.
Former French Open champion Li Na had a short and sweet ride into the second round, spoiling Dutchwoman Michaella Krajicek's comeback to the tournament with a 6-1 6-1 victory.
Li's progress was so straightforward that she began to lose concentration after going 5-0 up in the second set, allowing Krajicek to hold and then save two match points in a long seventh game on a sunny Court 12.
The sixth-seeded Li, China's first grand-slam champion when she won the 2011 French Open, recovered and hit a winning serve on the third matchpoint to progress to a meeting with Simona Halep of Romania who beat Olga Govortsova 6-2 3-6 6-3.
Krajicek, 24, had not played at Wimbledon since 2008, although the family name is still on the honours board after brother Richard won the men's singles title in 1996.