MEMPHIS, Tenn. — Top seed Marin Cilic of Croatia survived three match points in a third-set tiebreaker against Igor Sijsling of the Netherlands to advance to the quarterfinals of the U.S. National Indoor Championships with a 7-6 (2), 3-6, 7-6 (7) victory Thursday.
Cilic, the world's 12th-ranked player, battled Sijsling for more than 21/2; hours and saved four break points in the 11th game of the third set to take a 6-5 lead. Cilic squandered a match point with Sijsling serving at 5-6 in the third set.
In the tiebreaker, Sijsling double-faulted on his third match point of the tiebreaker and lost the match when he netted a forehand from behind the baseline.
The win moved Cilic, who won his ninth ATP Tour title two weeks ago in Zagreb, into the quarterfinals against fifth seeded Kei Nishikori of Japan, who advanced with a 6-3, 6-3 victory over qualifier Donald Young of the U.S.
Also on Thursday, Marinko Matosevic of Australia eliminated fourth-seeded Sam Querrey 3-6, 6-4, 7-5.
Querrey of the United States had saved one match point in the deciding game, but double faulted to send the advantage back to Matosevic. After a long rally from the baseline, Querrey sailed a forehand long, giving the Australian a berth in the quarterfinals.
Also moving into the quarterfinals were No. 7 seed Alexandr Dolgopolov of Ukraine, Denis Istomin of Uzbekistan and American Michael Russell.
Dolgopolov beat American qualifier Rhyne Williams 6-4, 4-6, 6-4; Istomin defeated former world No. 1 Lleyton Hewitt of Australia 6-1, 6-2 and Russell won 6-2, 6-4 over Lukasz Kubot of Poland.
Earlier Thursday in the women's quarterfinals of the tournament, top-seeded Kirsten Flipkens of Belgium was eliminated by Magdalena Rybarikova of Slovakia, the No. 7 seed, 6-7 (11), 7-5, 6-3.
Flipkens' loss meant the tournament's top two seeds in the women's draw are eliminated. Second-seeded Sofia Arvidsson lost her second-round match to Marina Erakovic on Wednesday.
And fourth-seeded Heather Watson of Britain also lost on Thursday, eliminated 6-1, 6-2 by Stefanie Voegele of Switzerland.
That left Sabine Lisicki of Germany as the only player of the top half of the draw to move on to the semifinals as she defeated eighth-seeded Kristina Mladenovic with a 6-3, 6-3 win. In today's semifinals, Voegele will play Erakovic of New Zealand, a 7-5, 6-2 winner over Jamie Hampton of the United States on Thursday, while Lisicki and Rybarikova will face off in the other match.
At Dubai, United Arab Emirates, former Wimbledon champion Petra Kvitova overpowered defending champion Agnieszka Radwanska 6-2, 6-4 to set up a semifinal against Caroline Wozniacki in the Dubai Championships.
Wozniacki, once ranked No. 1, defeated Marion Bartoli 4-6, 6-1, 6-4, capitalizing on 14 double-faults and 46 unforced errors by her opponent. Two double-faults cost Bartoli games in the second set.
Doubles specialist Roberta Vinci of Italy surprised former U.S. Open champ Sam Stosur 6-2, 6-4 in their quarterfinal. She will next face doubles partner Sara Errani, who downed Nadia Petrova of Russia 6-4, 0-6, 6-3.
Radwanska, ranked No. 4, had no answers for the big-hitting Kvitova, who neutralized her opponent with a powerful forehand.
Kvitova had 38 unforced errors against Radwanska.
Wozniacki was almost untouchable in the second set, and the third went back-and-fourth. Bartoli jumped ahead 2-0 and then Wozniacki ran off five straight games. Bartoli won two straight to make it 5-4 but Wozniacki was able to hang on and serve out the match.
At Marseille, France, defending champion Juan Martin del Potro beat Michael Llodra 3-6, 7-6 (4), 7-5 to reach the Open 13 quarterfinals.
Del Potro had 14 aces and saved nine of the 10 break points he faced as he was pushed all the way by the veteran Frenchman in a rematch of last year's final.
The 2009 U.S. Open champion faces another Frenchman, Gilles Simon, in the quarterfinals after he advanced to his third straight quarterfinals with a 6-3, 6-1 win against Roberto Bautista-Agut, although Simon's serve was again not at its best. He broke his Spanish opponent seven times, but conceded three breaks of his own.
Meanwhile, Russian qualifier Dmitry Tursunov also advanced after he upset fourth-seeded Janko Tipsarevic 7-6 (4), 6-2.
Tursunov, a semifinalist at the tournament two years ago, saved the four break points he faced and twice broke the Serb. He next plays Gilles Muller of Luxembourg. Seventh-seeded Jerzy Janowicz of Poland beat Frenchman Julien Benneteau 7-6 (0), 6-3, setting up a quarterfinal with top-seeded Tomas Berdych of the Czech Republic.