NEW YORK (CBSNewYork/AP)Roberta Vinci, last year’s US Open runner-up, didn’t drop a game in the first set, failed to serve out the match in the second, then hung on in the third to keep another run at Flushing Meadows going.

The seventh-seeded Italian needed nearly two hours to top 102nd-ranked Carina Witthoeft 6-0, 5-7, 6-3 in the third round Friday. This is the fourth time Vinci has reached the round of 16 at the US Open — she’s done it just three times combined at the other majors.

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And last year, she stunned Serena Williams in the semis to thwart her Grand Slam bid. It was Vinci’s first major final at age 32.

The 21-year-old Witthoeft, who’s been ranked as high as 49th, was looking to make her first Grand Slam round of 16. She’s now 0-5 against top-10 opponents.

Vinci was two points from victory while serving at 5-4 in the second set, but Witthoeft broke back, part of a run of four straight games to even the match. Vinci went up a break to start the third only for Witthoeft to later get the set back on serve. Then Vinci won the last three games to move on.

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Also Friday, two-time US Open runner-up Caroline Wozniacki advanced to her first Grand Slam round of 16 since last year’s Wimbledon.

Her ranking down to No. 74 after an ankle injury and on-court struggles, Wozniacki beat Monica Niculescu 6-3, 6-1 on Friday. It’s the first time since January she’s won three matches at the same tournament.

Against the 58th-ranked Niculescu, who presents an unusual style with a forehand slice, Wozniacki played more aggressively than her normal defensive game. Wozniacki is now 7-0 against the Romanian, who was trying to equal her best performance at a major by reaching the round of 16.

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