DUBAI, United Arab Emirates — Petra Kvitova won her first title in six months when she beat Sara Errani of Italy 6-2, 1-6, 6-1 in the Dubai Championships final on Saturday.

Kvitova also beat the Italian en route to her previous title — her ninth — in New Haven on the eve of the U.S. Open in August.

But this was the toughest match for the eighth-ranked Kvitova against No. 7 Errani.

Errani lost the first four points and her serve, and Kvitova easily won the first set.

The Czech appeared to lose her focus in the second set, committing consecutive double-faults and winning just one game. Errani charged the net and surprised Kvitova with drop shots.

In the third, Kvitova recovered enough to stave off break points in her second service game and put away Errani.

Errani also reached the indoor final in Paris. She and Roberta Vinci, whom she beat in the semifinals, won the Australian Open doubles title.

Copa Claro

Ferrer to defend Buenos Aires title AGAINST Wawrinka: In Buenos Aires, Argentina, David Ferrer will defend his Copa Claro title in the final against Stanislas Wawrinka of Switzerland.

Ferrer defeated fellow Spaniard Tommy Robredo 6-3, 6-2 Saturday on the outdoor clay, and Wawrinka defeated Nicolas Almagro 6-3, 7-5 to reach his first final in the Argentine capital. He lost his two other semifinal appearances, including last year to Almagro.

“It was a tough match physically,” said Ferrer, who has played three straight days. “Maybe it was my best match of the week.”

Ferrer won in Auckland, New Zealand, last month and will be going for his 20th career title.

Wawrinka broke Almagro in the 11th game of the second set and won when Almagro retuned his serve wide.

Wawrinka aims for his fourth ATP title.

U.S. National Indoor

Kei Nishikori of Japan advances to final: In Memphis, Tenn., Kei Nishikori was walking past Marinko Matosevic, ready to switch ends after winning the first set 6-4. The Australian stopped him near the umpire’s chair. Matosevic couldn’t continue, not with a bone bruise in his right foot making each step simply too painful.

Matosevic retired 37 minutes into his semifinal against Nishikori on Saturday, sending the Japanese player to the final of the U.S. National Indoor Championships. Nishikori called the quick end surprising because he didn’t know Matosevic was injured.

On Sunday, Nishikori will face Feliciano Lopez of Spain, a 6-2, 3-6, 6-3 winner over Denis Istomin of Uzbekistan. Lopez will be seeking his third title in his eighth career ATP final after a match he thought he had won with an ace — even preparing to shake hands with the chair umpire — only to replay the point because of a let ruling.

Nishikori will be looking for his third career title and first since winning in Tokyo last October. That’s when he became the first Japanese player to win on home soil in that tournament’s 40-year history.

The top Asian player in the ATP rankings at No. 22, the fifth-seeded Nishikori was the only seed to advance out of the quarterfinals.