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Also advancing to the third round was second-seeded Australian Open champion Li Na, who beat Yvonne Meusburger of Austria 6-2, 6-2 on Court 2. Meusburger had only four winners in the match. Li had 33 winners to go with 21 unforced errors.

Fourth-seeded Agnieszka Radwanska of Poland opened play on Centre Court and needed less than an hour to beat Australia’s Casey Dellacqua 6-4, 6-0.

The man who shocked Roger Federer at Wimbledon a year ago, Sergiy Stakhovsky, pulled off another surprise Wednesday. The 90th-ranked Ukrainian used the same serve-and-volley style that worked against Federer in 2013 to beat 12th-seeded Ernests Gulbis 6-4, 6-3, 7-6 (5).

No. 11 Grigor Dimitrov, coming of his win at the grass-court warm-up at Queen’s Club, sailed into the third round by beating Australian qualifier Luke Saville 6-3, 6-2, 6-4.

Also advancing were No. 16 Fabio Fognini, No. 20 Kevin Anderson, No. 21 Alexandr Dolgopolov and No. 27 Roberto Bautista Agut.