Novak Djokovic moved within four matches of completing the first men’s singles calendar-year Grand Slam in 52 years on Saturday while top-ranked Ashleigh Barty was eliminated from the US Open by a stunning fightback from American Shelby Rogers.

World number one Djokovic defeated Kei Nishikori 6-7 (4/7), 6-3, 6-3, 6-2, taking his 17th consecutive victory over the Japanese star and improving to 18-2 in their overall rivalry.

With a fourth career US Open trophy, Djokovic would complete the first men’s singles sweep of major titles in the same year since Rod Laver in 1969.

Reigning Wimbledon champion Barty won 11 of 14 games after dropping the first set, only for Rogers to capture five of the last six games for a shocking 6-2, 1-6, 7-6 (7/5) triumph.

Rogers had dropped all five prior meetings with Barty but would not be denied, breaking the Aussie as she served for the match in the eighth and 10th games as the crowd went wild at Arthur Ashe Stadium.

Rogers will next face 150th-ranked British qualifier Emma Raducanu, an 18-year-old who routed Spain’s Sara Sorribes Tormo 6-0, 6-1 in 70 minutes.

Djokovic, meanwhile, marched toward a 21st career Grand Slam title, which would break the deadlock for the men’s record he shares with Rafael Nadal and Roger Federer, both absent with injuries.

The 34-year-old Serbian star advanced to a fourth-round matchup on Monday against 99th-ranked US wildcard Jenson Brooksby.

Djokovic, who had 52 unforced errors and 45 winners, dropped the last three points of the first-set tie-breaker, the last on a Nishikori service winner.

But Djokovic broke early in each set from there to seize command. In the fourth he grabbed a 3-2 lead and never dropped another game.

Tokyo Olympic champion Alexander Zverev defeated 184th-ranked Jack Sock 3-6, 6-2, 6-3, 2-1 when the American retired with a right thigh injury.

Fourth seed Zverev, the 2020 US Open runner-up, joined qualifiers Oscar Otte and Peter Gojowczyk as the first German trio in the US Open fourth round since 1994 and any Slam last 16 since Wimbledon in 1997.

Wimbledon runner-up Matteo Barrettini, the Italian sixth seed, eliminated Ilya Ivashka of Belarus 6-7 (5/7), 6-2, 6-4, 2-6, 6-3. Next up is 144th-ranked Otte, who beat Italy’s Andreas Seppi 6-3, 6-4, 2-6, 7-5.

Greek 17th seed Maria Sakkari, a French Open semi-finalist, ousted two-time Wimbledon champion Petra Kvitova 6-4, 6-3, booking a fourth-round match against 2019 US Open winner Bianca Andreescu.

Czech 10th seed Kvitova double faulted on the final point to hand Sakkari the victory after 81 minutes.

Canadian sixth seed Andreescu improved to 10-0 at the US Open, advancing over 104th-ranked Belgian lucky loser Greet Minnen 6-1, 6-2.

Tokyo Olympic champion Belinda Bencic, a 2019 US Open semi-finalist, defeated US 23rd seed Jessica Pegula 6-2, 6-4.

The Swiss 11th seed will next face Polish seventh seed Iga Swiatek, last year’s French Open champion, who beat Estonian Anett Kontveit 6-3, 4-6, 6-3.

Czech fourth seed Karolina Pliskova, this year’s Wimbledon runner-up and a 2016 US Open finalist, beat Australian Ajla Tomljanovic 6-3, 6-2.

American Reilly Opelka has incurred the biggest fine so far at the US Open, paying $10,000 for logos on his equipment bag that were too large.

Opelka will have the funds to pay for his first-round violation. He’s into the last 16 at a Grand Slam event for the first time.

“What a joke on the US Open to do that. 10K for a pink bag? C’mon,” Opelka said, even though the fine related to the logo size rather than the color of the bag. The head referee was telling me you should have come in and had this thing measured. I actually thought it was a different bag. We had that logo specifically made. We measured. It is too big.”

Agencies