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TENNIS

RIO DE JANEIRO (AP) - Rafael Nadal showed no problem with his tender back in his second match since returning from the injury, defeating fellow Spaniard Albert Montanes 6-1, 6-2 to reach the quarterfinals of the Rio Open.

The No. 1-ranked Nadal tweaked his back warming up for the Australian Open final, which he lost almost four weeks ago in a major upset against Stanislas Wawrinka.

In the other key men’s match, third-seeded Fabio Fognini reached the last eight beating Pablo Cuevas of Uruguay 7-6 (1), 4-6, 6-3. Alexandr Dolgopolov of Ukraine advanced to his second quarterfinals of the year, beating Facundo Bagnis of Argentina 6-7 (4), 6-2, 7-6 (4).

On the women’s side of the combined ATP-WTA event, fifth-seeded Kurumi Nara of Japan and Lourdes Dominguez Lino of Spain set up a quarterfinal matchup after second-round wins. Irina-Camelia Begu of Romania also made the last eight, as did Brazil’s Teliana Pereira.

DELRAY BEACH, Fla. (AP) - John Isner held off an upset bid by Dudi Sela of Israel to advance to the quarterfinals of the Delray Beach Open after No. 3 seed Kei Nishikori of Japan exited the tournament because of a left hip injury.

The second-seeded Isner squandered four match points in the third set after leading 4-1, but the 6-foot-10 American rallied from a 5-2 deficit to prevail in the tiebreaker for a 3-6, 6-1, 7-6 (5) victory that earned him a spot in the quarterfinals for the third consecutive year.

The world No. 13 will face American qualifier Rhyne Williams, who ousted wild-card Marcos Baghdatis of Cyprus 6-7 (7), 6-4, 6-2.