TORONTO (AP)—World No. 1 and defending champion Caroline Wozniacki lost to Roberta Vinci 6-4, 7-5 in a second-round match at the Rogers Cup on Wednesday.
Wozniacki, who has won a WTA-leading five titles this year, was up 5-1 in the second set and looking to rally from a set down. However, the No. 22-ranked Italian stormed back with three break points to complete the upset.
Also, Serena Williams pulled out a tough second set to beat Julia Goerges 6-1, 7-6 (7). The former world No. 1 and 13-Slam champion used her intimidating serve, which topped out at nearly 122 miles per hour, to roll through her first set before the 20th-ranked German fought back in the second.
Williams will meet China’s Jie Zheng, who advanced Tuesday night when second-seeded Kim Clijsters pulled out due to stomach muscle injury.
Wozniacki had a bye in the first round and never really got going against the 22nd-ranked Italian, sending her return long on match point. Wozniacki also hit returns long twice at the first set point.
“I would have liked to have won that one and especially after leading 5-1 in the second,” Wozniacki said. “It’s not fun to lose this, but there’s nothing really I can do about it now, just practice, and try to do better.”
Windy conditions wreaked havoc with Wozniaki’s serve in the first set, as the ball repeatedly floated away when she tossed it above her. She had seven double-faults in the match.
“It was very difficult at first with the wind,” Wozniacki said. “Especially when you threw it up. It was going everywhere, so definitely that didn’t make it easy. It was blowing in different directions, but it’s the same for both players.”
Vinci reached the third round of the Rogers Cup in her third time in the tournament. She has wins this year in Barcelona, Budapest and Hertongenbosch.
“This is the best victory in my life,” the 28-year-old Vinci said. “I was 5-1 down but I knew that I can win the set because it was a lot of wind, so some mistakes. I tried to stay focused and play aggressive. That’s it, this is the key why I won the set.”
Earlier in the day, eighth-seeded Francesca Schiavone of Italy eased into the third round with a 6-1, 6-3 victory over Ekaterina Makarova of Russia.
Schiavone capitalized on five of her nine break point opportunities to win in just more than an hour, as play was temporarily halted shortly after the match due to rain.
Makarova, who advanced on Monday by eliminating Canada’s Rebecca Marino, also lost to Schiavone in the second round at last year’s tournament.
Also, Australia’s Samantha Stosur beat Canada’s Aleksandra Wozkiak 6-3, 6-4.
“Well, it’s disappointing,” Wozniak said. “You play at home and you want to do so well. But I thought it was a good match, and I had a really tough opponent today.”
In other matches, Wimbledon champion Petra Kvitova, defeated Anabel Medina Garrigues of Spain 7-6 (3), 6-3, and Lucie Safarova of the Czech Republic ousted Romania’s Simona Halep 6-2, 6-4.
A scheduled matchup between the top two Chinese players was canceled when Shuai Peng pulled out of her second-round match against world No. 6 Li Na with a left hip injury. Peng, who came into the match ranked No. 16, said she first sustained the injury last week in San Diego.
“It is sad for her,” Li said. “Always tough when you’re playing same-country player. We train together, we know much (about each other). Always tough.”