HIGHLIGHTS-Tennis-Wimbledon day seven

Highlights of the seventh day at Wimbledon, the third Grand Slam tournament of the year, on Monday (times GMT): 1315 SERENA RACES INTO QUARTERS, SETS UP RISKE CLASH

Serena Williams produced a clinical display to beat Spain's Carla Suarez Navarro 6-2 6-2 in 63 minutes on Court One. The seven-time champion struck 21 winners and won 78% of her first serve-points to set up a quarter-final clash with fellow American Alison Riske.

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Heavier balls to blame for the slower game at Wimbledon, says Nadal 1235 STRYCOVA FIGHTS BACK TO REACH QUARTERS

Barbora Strycova fought back from a set and 5-2 down to beat Belgian Elise Mertens 4-6 7-5 6-2. Strycova, who last reached the Wimbledon quarter-finals in 2014, will next face either Britain's Johanna Konta or her Czech compatriot Petra Kvitova.

1205 ZHANG SURVIVES YASTREMSKA SCARE China's Zhang Shuai recovered from a mid-match blip to beat Ukrainian 19-year-old Dayana Yastremska 6-4 1-6 6-2.

Zhang, ranked 50th in the world, equalled her best ever Grand Slam singles performance - a quarter-final appearance at the 2016 Australian Open. 1200 SVITOLINA SAILS INTO QUARTERS

Eighth seed Elina Svitolina struck 30 winners in a routine 6-4 6-2 win over Croatia's Petra Martic to reach her first Wimbledon quarter-finals. 1150 RISKE DOWNS WORLD NUMBER ONE BARTY IN THREE SETS

American Alison Riske came back from a set down to beat world number one Ash Barty 3-6 6-2 6-3 in the last 16. Riske ranked 55th in the world, claimed a decisive break in the eighth game of the final set to knock out Australian Barty and reach her first Grand Slam quarter-finals.

"I'm so excited, and so proud of myself for the way I've handled matches here," Riske said after the match. "I couldn't begin to say what Wimbledon means to me. Getting to the quarter-finals is amazing, but just the way I've been fighting is the best thing for me."

1100 PLAY ON 'MANIC MONDAY' BEGINS AT WIMBLEDON Roger Federer, Rafael Nadal, Novak Djokovic and Serena Williams are all round of 16 actions at the All England Club later on Monday.