The United States won a doubles five-setter against Spain yesterday to maintain its chance of reaching the Davis Cup final against either Argentina or Russia.

Mike Bryan and Mardy Fish beat Fernando Verdasco and Feliciano Lopez, 4-6, 6-4, 6-3, 4-6, 6-4, on clay in Madrid, Spain, to cut the Spaniards' match lead to 2-1 and ensure the semifinal result depends on reverse singles today.

Bryan usually plays doubles with his twin brother, Bob. But he pulled out with a shoulder injury and Fish was a late replacement.

"Obviously it was a little worrisome. But we finished it off," Bryan said. "I admired the way Mardy stayed with me. That kept me up, he kept me positive."

The first of the reverse singles is Rafael Nadal against Andy Roddick and, if the big-serving American beats the world's best player to make it 2-2, it goes down to David Ferrer of Spain against Sam Querrey.

Russia also won a five-set doubles match to stay alive in the other semifinal.

Igor Kunitsyn and Dmitry Tursunov beat David Nalbandian and Guillermo Canas, 6-2, 6-1, 6-7 (9), 3-6, 8-6, in Buenos Aires to prevent Argentina taking a 3-0 lead.

Nalbandian plays Nikolay Davydenko today and Argentine Juan Martin del Potro, who won his singles Friday, faces Igor Andreev.

Elsewhere, Roger Federer guided Switzerland into next year's World Cup by teaming up with fellow Olympic gold medalist doubles partner Stanislas Wawrinka in a victory over Belgium's Xavier Malisse and Olivier Rochus.

The Swiss triumphed, 4-6, 7-6 (6), 6-3, 6-3, in Lausanne to capture an unbeatable 3-0 lead.

Olympic bronze medalist Vera Zvonareva beat China's Zheng Jie, 6-3, 7-5, to advance to the final of the Guangzhou International in China. The top-seeded Russian will face fourth-seeded Peng Shuai of China, a 6-2, 6-1 winner over France's Camille Pin.

Will MacKenzie lost three strokes -- two for a rules infraction -- on the final hole to give the Viking Classic lead back to Mark Turnesa. MacKenzie's 8 on the par-5 18th left him tied for second with Brian Gay, two strokes behind Turnesa on the Annandale course in Madison, Miss. MacKenzie was penalized for moving impediments in the hazard while his ball was also in the hazard. Turnesa, a PGA Tour rookie who also topped the second-round leader board, shot a 6-under 66 for a 17-under 199 total. MacKenzie and Gay had 67s. MacKenzie, who has one tour victory, the Reno-Tahoe Open in 2006, opened with birdies on the first two holes and made the turn at 32. His only stumble before 18 was a bogey on the fourth hole.

Defenders Lori Chalupny and Kate Markgraf scored goals to help the Olympic champion U.S. women's team beat Ireland, 2-0, in Bridgeview, Ill., the Americans' third consecutive shutout victory in this three-game series.

Asjha Jones scored 16 points and the host Connecticut Sun forced a decisive Game 3 against the New York Liberty with a 73-70 victory in the Eastern Conference WNBA playoffs. This first-round series will be settled tomorrow night in Connecticut.

Olympic gold-medalist Dawn Harper of the United States won the 100-meter hurdles at the Golden Grand Prix in Shanghai, China. Harper won the event in 12.56 seconds. Jamaica's Veronica Campbell-Brown won the 100 in 11.01. World record-holder Yelena Isinbayeva of Russia won the pole vault at 15 feet, 1 inch after three failed attempts at 15-7. Christian Cantwell of the United States won the men's shot put.

Heavily favored Commentator won the 66th Massachusetts Handicap by 14 lengths, beating an overmatched field over 1¹/₈ miles at Suffolk Downs in Boston. Won Awesome Dude placed and Cuba came in third to share the $500,000 purse. Jockey John Velazquez rode Commentator to the wire in front of a crowd of 17,172, adding the 7-year-old gelding trained by Hall of Famer Nick Zito to a list of winners that includes Seabiscuit, Whirlaway and Cigar.