LONDON (AP) - It looked all too easy for the champions at the All England Club.
Defending women's champion Petra Kvitova and former men's winners Roger Federer, Rafael Nadal and Andy Murray all won their first-round matches at Wimbledon on Tuesday in straight sets.
The big names imposed themselves on Day 2 of the grass-court Grand Slam as London basked in warm, sunny conditions.
In keeping with Wimbledon tradition, Kvitova had the honor of playing the first match on Centre Court on the second day as the reigning women's champion.
The second-seeded Czech wasted no time in reasserting her dominance on her favorite court, overpowering Kiki Bertens of the Netherlands 6-1, 6-0 in just 35 minutes.
Kvitova won 28 of 29 points on serve, with the only blemish coming when she double-faulted on the first point of the final game, hitting a 93 mph (150 kph) second serve just wide.
Federer, the seven-time men's champion, followed Kvitova on Centre Court and needed just 68 minutes to dispatch 88th-ranked Damir Dzumhur of Bosnia 6-1, 6-3, 6-3.
The second-seeded Federer, bidding to become the first man to win eight Wimbledon titles, broke five times and never faced a break point.
''I must say I'm very happy, always, to win like that,'' he said.
Nadal, a two-time champion, coasted to a 6-4, 6-2, 6-4 win over Thomaz Bellucci of Brazil on Court 1. He hopped in the air and pumped his fist after completing the victory.
''Here the feeling in Wimbledon is so special, and playing on grass, too,'' Nadal said. ''So always is very emotional when you hit some good shots in this beautiful club.''
Murray, the 2013 winner, faced a stiffer test against Mikhail Kukushkin of Kazakhstan. But the third-seeded Briton rewarded his adoring home fans on Centre Court with a 6-4, 7-6 (3), 6-4 win in a little over two hours.
''I found it difficult to play aggressive tennis out there,'' Murray said. ''I was glad to get through in straight sets.''
Other men's winners Tuesday included No. 12 Gilles Simon, No. 13 Jo-Wilfried Tsonga, No. 15 Feliciano Lopez, No. 18 Gael Monfils, No. 20 Roberto Bautista Agut, No. 22 Viktor Troicki, No. 23 Ivo Karlovic, No. 25 Andreas Seppi and No. 30 Fabio Fognini.
Jack Sock, the 31st-seeded American, was knocked out by Sam Groth of Australia, 6-3, 3-6, 6-3, 6-3.
Among the women, No. 5 Caroline Wozniacki, No. 8 Ekaterina Makarova, No. 13 Agnieszka Radwanska, No. 15 Timea Bacsinszky, No. 17 Elina Svitolina, No. 18 Sabine Lisicki, No. 20 Garbine Muguruza, No. 26 Svetlana Kuznetsova and No. 28 Jelena Jankovic advanced to the second round.