Reigning champion Petra Kvitova began the defence of her Wimbledon title in emphatic style as she thrashed Holland's Kiki Bertens in straight sets.
Kvitova lost just one point on her serve during the contest, which came with a double fault in the final game, as she beat Bertens 6-1 6-0 in 35 minutes.
It was the Czech's first competitive match on grass this season but she showed few signs of rust on Centre Court and will face either Japan's Kurumi Nara or Poland's Magda Linette in round two.
Serena Williams now holds all four majors for the second time in her career, after dispatching Garbine Muguruza.
Reigning champion Novak Djokovic has boooked his place in Sunday's Wimbledon final with a straight sets victory over Richard Gasquet
The former England captain's quick reflexes stole the show as Jamie Murray reached his second Wimbledon final.