Top seed Swiatek through to third round…..

Top seed Iga Swiatek reached the third round of the women’s singles with a tenacious straight-set win over Petra Martic on Centre Court at Wimbledon.

Croatian Martic pushed the Polish world number one in moments but lost her serve late in both sets in Swiatek’s 6-4 6-3 win.

She also needed a lengthy medical timeout for a back injury in the opening set.

Swiatek’s victory extended her formidable win streak to 21 matches.

The 23-year-old is a five-time Grand Slam winner, although she has struggled on grass in the past, and has never advanced beyond the quarter-finals at SW19.

Swiatek will face Yulia Putintseva in the third round with the Kazakh player upsetting Czech 27th seed Katerina Siniakova 6-0 4-6 6-2 earlier on day four.

Elsewhere in the women’s draw, American fifth seed Jessica Pegula became the highest-ranked casualty at this year’s singles when she was beaten by world number 42 Wang Xinyu.

The Chinese player won 6-4 6-7 (7-9) 6-1 on court three to set up a third-round tie with Britain’s Harriet Dart.

Pegula had looked in formidable form on grass, reaching the final of Eastbourne and winning her first-round tie at Wimbledon in just 49 minutes.

Caroline Garcia, the 23rd seed from France, was also knocked out, losing 6-3 3-6 6-4 to world number 97 Bernarda Pera of the United States.