Naomi Osaka withdraws from first-round match with back injury

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Naomi Osaka’s recent struggles continued Tuesday with an early exit at the National Bank Open.

The four-time Grand Slam champion retired from her first-round match with a back injury. She was trailing 7-6 (4), 3-0 against Estonia’s Kaia Kanepi when she withdrew from the contest.

"I felt my back from the start of the match, and despite trying to push through it, I just wasn’t able to today," Osaka said. "I’d like to pay credit to Kaia for playing well and want to wish her all the best for the rest of the tournament."

Entering the tournament, Osaka had been eliminated from her last three competitions in the first or second round, including a straight-sets loss to Coco Gauff at last week’s Mubadala Silicon Valley Classic. That was her first tournament since the French Open as she recovered from an Achilles injury.

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Naomi Osaka rests during a match against Kaia Kanepi of Estonia, during the National Bank Open tennis tournament in Toronto, on Tuesday, Aug. 9, 2022.  (Christopher Katsarov/The Canadian Press via AP)

Prior to that run, she had her best tournament of the year making it to the final of the Miami Open in early April before losing to top-ranked Iga Swiatek.

The 31st-ranked Kanepi will next play No. 8 Garbine Muguruza of Spain.

In other matches, 10th seeded Gauff beat fellow American Madison Brenglem 6-1, 6-3; China's Zheng Qinwen got past Canada's Rebecca Marino, 3-6, 7-6 (5), 6-4; Italy's Camila Giorgi defeated ninth-seeded Emma Raducanu of England, 7-6 (0), 6-2; and Bianca Andreescu of Canada beat Daria Kasatkina of Russia, 7-6 (5), 6-4. Elise Mertens of Belgium, Sara Sorribes Tormo