Second seed Caroline Wozniacki crashes out of Wimbledon as the Williams sisters make it through to the third round.
Wozniacki crashed out after being beaten by Ekaterina Makarova. The Danish second seed struggled in the first set, losing it 6-4, but bounced back to take the game to a decider after winning the second 6-1.
Makarova, who has previously made the quarter-final at the All England Club, further than Wozniacki has ever been, took a 5-1 lead in the third but then threw away four match points as Wozniacki battled back to 5-5.
The Russian kept her cool, however, to hold serve and then break Wozniacki, winning 6-4 1-6 7-5.
Seven-time champion Serena Williams won 6-1 6-4 in just over an hour against Viktoriya Tomova on her first return to Centre Court since winning the title in 2016.
Tomova, the 23-year-old Bulgarian, had won her first Grand Slam match in the opening round, but was no match for her opponent in the first set as she struggled to compete, but did improve dramatically in the second.
Williams, however, was rarely challenged on her own serve and is now through to the last 32.
Five-time champion Venus Williams once again dropped the opening set but again dominated the rest of the match to win.
The No 9 seed, who is the oldest woman in the draw at 38, came back to beat 141st-ranked qualifier Alexandra Dulgheru of Romania 4-6, 6-0, 6-1 to reach the third round at the All England Club.
Williams got broken in the first game and did not recover in the opening set, in which she made 12 unforced errors, twice as many as Dulgheru. Nine of those were errant forehands.
But the American, the runner-up at Wimbledon a year ago, then won seven games in a row.
There were also wins for Madison Keys and fifth seed Karolina Pliskova. Keys, the 10th seed, eased past Luksika Kumkhum 6-4 6-3 while the Czech Pliskova beat Victoria Azarenka 6-3 6-3 on Centre Court
British teenager Katie Swan, who won her first ever match at Wimbledon on Monday, was no match for 29th seed Mihaela Buzarnescu as the 19-year-old fell to a 6-0 6-3 defeat.
Agnieszka Radwanska, who made the final in 2012, was beaten in straight sets by Lucie Safarova. The Czech won 7-5 6-4. While Donna Vekic beat Rebecca Peterson 7-5 6-4 and Yanina Wickmayer saw off Andrea Petkovic 6-4 6-3.
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