HIGHLIGHTS-Tennis-French Open day four

Highlights of the fourth day at the French Open, the final Grand Slam tournament of the year, on Wednesday (all times GMT): 1834 ZVEREV BATTLES PAST HERBERT

Sixth seed Alexander Zverev was taken to five sets by Pierre-Hugues Herbert before he beat the Frenchman 2-6 6-4 7-6(5) 4-6 6-4. On another disappointing day for local players, Benoit Paire also crashed out after losing 7-6(3) 4-6 6-3 6-1 to Argentine Federico Coria.

READ MORE: Ruthless Nadal stays on course for 13th French Open title

Thiem survives late wobble to ease past American Sock Jack Sock v Dominic Thiem - match stats

Wawrinka says ready to challenge for title at Roland Garros Travaglia beats Nishikori to continue Italian surge

Disciplined Halep beats Begu to extend winning run to 16 Serena pulls out of French Open with Achilles injury

Third seed Svitolina recovers from meltdown to beat Zarazua Qualifier Zarazua should be proud of Paris show, says Svitolina

Azarenka thrashed by Schmeidlova at French Open Anisimova steamrolls into French Open third round

Quiet please: French jet's sonic boom shakes Paris, disrupts tennis Cramping Bertens leaves court in wheelchair after beating Errani

Errani accuses wheelchair-bound Bertens of exaggerating injury Watson concerned about future of British tennis

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Jelena Ostapenko v Karolina Pliskova French Open order of play on Thursday

1631 HALEP TOO GOOD FOR FELLOW ROMANIAN BEGU Simona Halep beat Irina-Camelia Begu 6-3 6-4 to improve her overall record against her Romanian compatriot to 8-0. Top seed Halep, the 2018 champion, is chasing her third major title.

1542 MERTENS ROLLS INTO THIRD ROUND Belgian 16th seed Elise Mertens beat Estonia's Kaia Kanepi 6-4 7-5. Earlier, Kiki Bertens of the Netherlands battled past Sara Errani 7-6(5) 3-6 9-7 before leaving the court in a wheelchair after struggling physically in the final set.

1446 THIEM GETS PAST QUALIFIER SOCK Dominic Thiem, the runner-up in 2018 and 2019, staved off a late comeback attempt by American qualifier Jack Sock in their first meeting on clay to win 6-1 6-3 7-6(6). The U.S. Open winner will meet Casper Ruud in the next round.

1410 NADAL CRUISES INTO THIRD ROUND Rafa Nadal continued his bid for a 20th major to equal Roger Federer's all-time record by swatting aside unseeded American Mackenzie McDonald 6-1 6-0 6-3.

Another crown in Paris will make the Spaniard the first player in the Open era to win 13 singles titles at any Tour-level event. 1225 WAWRINKA SEES OFF KOEPFER, ISNER CRASHES

Swiss 16th seed Stan Wawrinka suffered a mid-match blip before dismissing German Dominik Koepfer 6-3 6-2 3-6 6-1. John Isner, who had lost his previous two matches against fellow Americans at the majors, was beaten by compatriot Sebastian Korda 6-4 6-4 2-6 6-4.

1137 TENTH SEED AZARENKA DUMPED OUT BY SCHMIEDLOVA Unseeded Slovakian Anna Karolina Schmiedlova, ranked 161 in the world, eased past U.S. Open runner-up Victoria Azarenka 6-2 6-2 in their first meeting to book her spot in the third round.

1048 SVITOLINA SURVIVES ZARAZUA SCARE Third seed Elina Svitolina, who lifted the Strasbourg title on Saturday, was handed a bagel in the second set of her match against Mexico's Renata Zarazua but regained focus to claim a 6-3 0-6 6-2 win and reach the third round.

1016 SERENA WILLIAMS WITHDRAWS FROM FRENCH OPEN Serena Williams's French Open campaign ended after she withdrew from her second-round match against Tsvetana Pironkova due to an Achilles injury.

"I really wanted to give an effort here. I'm struggling to walk so that's a tell-tale sign that I should try to recover," she told reporters.