Maria Sharapova, who’s been mired in a horrific slump since returning from an injury 10 months ago, won the Toray Pan Pacific championship earlier today in Japan.

Sharapova was leading 5-2 in Saturday’s final at Ariake Colosseum when the seventh-seeded Jankovic took a timeout to have her right arm examined by the trainer.

The Serbian player returned to the court and lost the first two points of the eighth game before retiring.

“It’s disappointing,” Sharapova said. “It’s toward the end of the year and there are a lot of injuries so I wish Jelena a speedy recovery.”

It was Sharapova’s first title since Amelia Island in April, 2008, although she has spent long periods of the tour in the interim.

Even if Jelena Jankovic did have to retire in the first set, everyone on the WTA Tour is so broken down by the end of the year that nagging injuries are expected. I wasn’t able to catch this match for obvious reasons, but I would’ve liked to see how Sharapova looked coming out strong. She hasn’t been atrocious, but lately she’s tended to lose her rhythm rather quickly. With her performance today, Sharpova proved she’s down but not out. Anything is possible. Just look at Kim Clijsters, who won this past U.S. Open after taking two years off to start a family. Sharapova is only 22, so she has plenty of time to regain her authority.

Competition just got interesting at the U.S. Open as Andy Roddick, Maria Sharapova, and Dinara Safina have all been eliminated.

Melanie Oudin’s face was flushed from a mix of exertion and excitement and maybe even a bit of bewilderment — “Yes, I DID beat Maria Sharapova!” running through her mind — when she stepped out of the U.S. Open locker room and saw Mom.

Several hours later, on the same court, another unheralded American who has lived in Georgia pulled off another upset of a past U.S. Open champion: 55th-ranked John Isner pounded 38 aces and eliminated No. 5 Andy Roddick 7-6 (3), 6-3, 3-6, 5-7, 7-6 (5) to reach the fourth round at a major tournament for the first time.

Keeping with the day’s theme, No. 1-seeded Dinara Safina exited, too, a 6-4, 2-6, 7-6 (5) loser against 72nd-ranked Petra Kvitova of the Czech Republic. After escaping the first two rounds with poorly played three-set victories, Safina wasted three match points Saturday night and finished with nine double-faults and 39 total unforced errors. Her departure means the Williams sisters are the only members of the top five women left in the field

On the plus side, at least Roddick was ousted by a fellow American. While I wanted to see Roddick take on Nadal in the final, I’m now completely rooting for this Isner character. The Georgia Bulldogs alum has yet to make his mark during his time on the ATP Tour. This looks like his chance.

Oudin’s story is even more exciting. Not only did she eliminate Maria Sharapova, but she upset Elena Dementieva, a two-time Grand Slam finalist and the Beijing Olympics gold medalist, in the second round. For the sake of diversity, I hope she makes it to the finals.