With every tournament Caroline Wozniacki wins—she’s won four of her last five—it’s becoming harder and harder to say that she’s actually not the world No. 1.

Should we be saying something similar about Vera Zvonareva, the newly-minted No. 2 who’s won 19 of her last 23 matches?

Serena Williams, 2010′s dominant female player, has been out of the picture since Wimbledon. Obviously, that’s a major reason why Wozniacki and Zvonareva are where they are in the rankings. But let’s not discount the weight these two have pulled. As the top-ranked woman, Wozniacki hasn’t melted under the spotlight—quite the opposite, it seems—and Zvonareva has been spectacular of late.

Today was one of her finest hours. Two hours, actually, in a 7-6 (4), 6-4 win, which puts Zvonareva at 2-0 for the Championships. The Russian rallied from first- and second-set deficits, and didn’t crumble when the tide shifted Azarenka’s way. In the first-set tiebreaker, a pivotal juncture of the match, Zvonareva let a 3-0 lead slip as she double-faulted up 4-2 to put the overtime back ”on serve.” Unfazed, she won three of the next four points to take the set.

Azarenka, playing her first match of the event, seemed to ride her momentum from winning last week’s Kremlin Cup. She’s now 0-1, but her form suggests she’ll remain a threat in the White Group. A win over the struggling Jelena Jankovic seems likely; a win over Kim Clijsters would be immense.

As for Zvonareva? A win over Clijsters would be great, of course. Certainly possible. But she might not even need it to advance. Two match wins—old hat, for the new No. 2—gives her a bit of a cushion.

—Ed McGrogan

Melanie Oudin, Bethanie Mattek, Liezel Huber and Coco Vandeweghe have been named to the United States Fed Cup team, which will play Italy in the final next month.

Daniela Hantuchova and Kimiko Date Krumm have received wildcards for the lower-tier WTA season-ender in Bali, joining Na Li, Aravane Rezai, Yanina Wickmayer, Anastasia Pavlyuchenkova, Ana Ivanovic and Alisa Kleybanova in the field.

Thomas Muster has lost in the first ATP match of his comeback, falling 6-2, 7-6(5) to Andreas Haider-Maurer in Vienna.

WHITE PLAINS, New York (AP)—Teenager Coco Vandeweghe is joining Melanie Oudin, Bethanie Mattek-Sands and doubles specialist Liezel Huber on the U.S. team that will face Italy in the Fed Cup final.

With Serena and Venus Williams sidelined by injuries, U.S. captain Mary Joe Fernandez picked the 115th-ranked Vandeweghe on Tuesday for the Nov. 6-7 Fed Cup final on an indoor hard court at the San Diego Sports Arena.

The 18-year-old Vandeweghe is the niece of former NBA general manager Kiki Vandeweghe. Fernandez says her big serve, heavy groundstrokes and slice give the team “a different sort of game to add.”

The United States hasn’t won a Fed Cup title since 2000 and lost to Italy in last year’s final.

Daniela Hantuchova and Kimiko Date Krumm have received wildcards for the lower-tier WTA season-ender in Bali, joining Na Li, Aravane Rezai, Yanina Wickmayer, Anastasia Pavlyuchenkova, Ana Ivanovic and Alisa Kleybanova in the field.

VIENNA (AP)—Thomas Muster, once ranked No. 1, lost his first match in his return to the ATP Tour after 11 years away. The 43-year-old Austrian intends to resume his comeback next season.

Muster was beaten by 23-year-old and fellow Austrian Andreas Haider-Maurer 6-2, 7-6 (5) on Tuesday in the first round of the Bank Austria Trophy.

The result means that Jimmy Connors remains the oldest player to win on the ATP Tour. At 42, he reached the quarterfinals in Halle, Germany, in 1995.

Muster won the French Open in 1995 and became No. 1 the next year. He returned to competitive tennis on the second-tier Challenger circuit in June before accepting a wild card for the Vienna tournament.

“I’ll keep training hard and plan to enter 20 to 25 events from March,” Muster said.

He had been drawn to face Ernests Gulbis in the first round before the 24th-ranked Latvian pulled out Monday for personal reasons.

“I am relieved despite losing as I gave my best and played pretty well,” Muster said. “A third set would have been great, but well done to Andreas.”

Muster dropped serve in the opening game and struggled throughout the first set, failing to pressure his 157th-ranked opponent.

Muster, who won 40 of his 44 career titles on clay, was searching for the right timing of his groundstrokes on the fast indoor hard court. He found some rhythm and saved four break points to take the second set into a tiebreaker, but hit a forehand wide on Haider-Maurer’s second match point.

“There was more in it if I could have played more aggressively in the first set,” Muster said. “In the second, I managed to dictate the pace of the game sometimes.”

Earlier, James Blake of the United States lost 6-4, 6-4 to Lukasz Kubot of Poland in the first round. Kubot broke his seven-match losing streak and will next face top-seeded Jurgen Melzer, the defending champion.

Michael Berrer upset sixth-seeded Guillermo Garcia-Lopez 6-3, 4-6, 7-5. The 29th-ranked Spaniard, who won in Bangkok and reached the quarterfinals in Tokyo and Shanghai this month, double-faulted 12 times.

Berrer will play Pablo Cuevas, who defeated Thiemo de Bakker 7-6 (6), 1-6, 6-4. Santiago Geraldo stopped Xavier Malisse 6-4, 1-6, 6-1, and Grega Zemlja of Slovenia rallied past Marsel Ilhan of Turkey 4-6, 6-1, 7-5.