NEW YORK — Denis Shapovalov advanced to the third round of the U.S. Open with an entertaining and error-filled 7-6 (6), 3-6, 7-6 (4), 6-3 win over France’s Valentin Royer on Thursday.

Shapovalov picked up his sixth break on match point in a contest where both players struggled to hold serve.

The 27th-seeded Canadian fired 29 aces but hit into 43 unforced errors, two more than Royer, in a match that took three hours 36 minutes to complete despite lasting just four sets.

Later Thursday, Leylah Fernandez of Laval, Que., teamed with tennis legend Venus Williams to defeat sixth-seeds Ellen Perez of Australia and Lyudmyla Kichenok of Ukraine 7-6 (4), 6-3 to open women’s doubles play.

Fernandez and Williams, the 45-year-old seven-time Grand Slam winner who recently returned to action, were gi

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