American Jack Sock reaches Auckland’s ASB Classic final

Viktor Troicki of Serbia serves in his quarterfinal match against Nicolas Mahut of France during the Sydney International Tennis tournament in Sydney Friday, Jan. 15, 2016.(AP Photo/Rob Griffith)

SYDNEY (AP) Jack Sock ended David Ferrer's hopes of a fifth singles title in Auckland when he beat the top-seeded Spaniard 3-6, 6-1, 6-2 in Friday's semifinals of the ASB Classic.

Ferrer seemed on track for another title when he took the first set in 28 minutes. But the 26th-ranked Sock broke the eighth-ranked Ferrer's serve in the second game of the second set and held serve for 3-0, and was never threatened the rest of the way.

Sock advanced to his third ATP Tour final after finishing runner-up indoors at Stockholm last year and winning on clay in Houston.

''Obviously I knew coming in I had to play some unbelievable tennis and fortunately I was able to do that,'' Sock said. ''It was a difficult day, started out I woke up with some flu-like symptoms and didn't know if I was going to be able to play.

''I ended up coming out and playing some of the best tennis of my career so maybe I can stay sick to Melbourne if I play like this.''

At the Sydney International, Viktor Troicki won his rain-delayed quarterfinal and Australian Bernard Tomic retired from his match against Russian Teymuraz Gabashvili while trailing 6-3, 3-0.

Tomic said he was feeling ill and may have had food poisoning. He plays his first-round match at the Australian Open in Melbourne on Tuesday against Uzbekistan's Denis Istomin.

Rain had postponed Tomic's quarterfinal until Friday morning, meaning he would have been forced to play a second match later in the day had he advanced to the semifinals.

''I was just feeling a little bit sick last night and was very difficult to play two matches today,'' Tomic said.

Third-seeded Troicki beat Nicolas Mahut 4-6, 6-3, 6-3 and will play Gabashvili later on Friday for a spot in Saturday's final.

Fourth-seeded Grigor Dimitrov advanced with a 4-6, 6-3, 6-4 quarterfinal win over Alexandr Dolgopolov and will next play Gilles Muller, who beat sixth-seeded Jeremy Chardy of France 7-6 (5), 6-3.

In the women's semifinals at Sydney, two-time Grand Slam champion Svetlana Kuznetsova beat top-seeded Simona Halep 7-6 (5), 4-6, 6-3. Kuznetsova's final opponent will be Monica Puig, who advanced when Belinda Bencic retired ill after losing the first set 6-0.

At the Hobart International, Eugenie Bouchard, playing her best stretch of tennis since sustaining a concussion in a dressing room fall at the U.S. Open last September, advanced to the final with a 6-1, 4-6, 6-4 win over third-seeded Dominika Cibulkova of Slovakia.