Kvitova won all but one point on her own serve in seeing off Kiki Bertens 6-1 6-0 as she started the defence of her title in a 35-minute Centre Court stroll.
The Czech player was dominant from the start, making the most of every error her Dutch opponent made as well as being dominant in her service games.
Two breaks were enough to secure the first set and three more put her 5-0 up in the second, Kvitova coming out to start the final game having won all 24 points on service.
But the first point of the game saw Kvitova serve a double-fault to the groans of a packed crowd who were braving temperatures over 90 degrees. She managed to overcome that slight disappointment to see the game out and set up a clash withKurumi Nara of Japan, who was leading 3-6 6-4 4-3 when Polish opponent Magda Linette retired from their first-round match.
Kerber, seeded 10, needed only 45 minutes to cruise past German compatriot Carina Witthoeft 6-0 6-0 on Court 18, where temperatures were already nudging 85 degrees by the time their match started at 11.30am.
She dominated all phases of the match, taking six of her 12 break points, while Witthoeft wasted the three she secured, including one in the final game as she looked to avoid the dreaded ‘double bagel’.
There had not been a 6-0 6-0 win in the ladies’ singles at Wimbledon for six years, but there have been three in the first two days of the 2015 tournament with Venus Williams and Andrea Petkovic winning on Monday without losing a game.
Kerber was delighted with her win but felt a little sorry for Witthoeft, as she said: “Carina was playing not bad, actually. The games were not like 40-love. It was very close, actually.
“It’s always tough to play against a German. It’s always not easy. I’m very??happy about my performance in the first round. I’m feeling good on grass, and I’ve always played well on it. Two weeks ago I won my first title on grass, so it’s always good to come with a title to the tournament and to a grand slam.”
Kerber will next face Anastasia Pavlyuchenkova of Russia, who was taken to three stamina-sapping sets by Germany’s Mona Barthel before winning 6-7 7-6 6-2.