Serena's winning streak ends at 14

Serena Williams' latest lengthy winning streak came to an end at 14 after a loss to Victoria Azarenka in the final of the Western & Southern Open.

Top-ranked Serena Williams wilted just one set away from a breakthrough win at a tournament that has eluded her all her career.

Williams had never won a Cincinnati title. She was trying for her second championship in two weeks, fresh off her championship in Toronto.

She dominated the first set, then fell apart, giving No. 2 Victoria Azarenka a chance to rally for a 2-6, 6-2, 7-6 (6) win that ended Williams' 14-match winning streak. Williams committed 58 unforced errors that turned the momentum.

''I just felt really off this whole week, but I was surprised to be in the final and surprised to be doing well,'' Williams said. ''So I don't know, there's a few factors. I think what matters most was just fighting the whole time and survived to the end.''

The week in Cincinnati provided a preview for the U.S. Open — both for the men's bracket, where it's more jumbled at the top, and the women's, where it's more settled.

Williams has dominated the female side, going 60-4 this season. She has never done well in Cincinnati, and was eager to win on Sunday for a career-best ninth title of the season. All the statistics were in her favor — a 12-2 career record against Azarenka, including that U.S. Open title last year.

She won the first set in 26 minutes, dropping only 11 points. Then, she got sloppy in a second set that bogged down. The sixth game went to deuce 12 times before Williams held serve on the 30th point. Williams appeared to wear down and lost the set 6-2.

It was reminiscent of their finals match at the U.S. Open last year, when Williams took the last four games to win 6-2, 2-6, 7-5. This time, Azarenka held on, winning a couple decisive points off Williams' serve in the tiebreaker.

Tournament officials handed her an oversized bottle of champagne when she finished off the 2-hour, 29-minute match. Azarenka was hesitant to pop the cork, until Williams encouraged her. She sprayed the court and took a sip.

''I need to get more practice because I felt like I'm not directing it too well,'' she said.

Williams had won two straight titles since a surprising loss to Sabine Lisicki in the fourth round at Wimbledon. Here is the whole winning streak since:

Swedish Open

First round — Def. Sesil Karatantcheva, 6-1, 6-2

Second round — Def. Anna Tatishvili, 6-2, 6-3

Quarterfinals — Def. Lourdes Dominguez Lino, 6-1, 6-1

Semifinals — Def. Klara Zakopalova, 6-0, 6-4

Final — Def. Johanna Larsson, 6-4, 6-1

Rogers Cup

Second round — Def. Francesca Schiavone, 6-3, 6-2

Third round — Def. Kirsten Flipkens, 6-0, 6-3

Quarterfinals — Def. Magdalena Rybarikova, 6-1, 6-1

Semifinals — Def. Agnieszka Radwanska, 7-6 (3), 6-4

Final — Def. Sorana Cirstea, 6-2, 6-0

Western & Southern Open

Second roung — Def. Eugenie Bouchard, 4-6, 6-2, 6-2

Third round — Def. Mona Barthel, 6-4, 6-1

Quarterfinals — Def. Simona Halep, 6-0, 6-4

Semifinals — Def. Li Na, 7-5, 7-5

The Associated Press contributed to this report.