NEW HAVEN, Connecticut (AFP) -- America's Lindsay Davenport suffered an injury scare on the eve of the U.S. Open when she was forced to retire from the WTA final here against Justine Henin-Hardenne on Saturday.

Davenport was trailing 6-0 1-0 to the Belgian second seed when she conceded the match due to a right shoulder injury.

In the men's singles final, second seed Nikolay Davydenko of Russia defeated No. 10 Agustin Calleri of Argentina 6-4 6-3.

Davydenko, who will be seeded seventh at the U.S. Open, captured his third title of the year and buoyed his confidence heading into the final Grand Slam of the year, which starts today at Flushing Meadows.

For Davenport, however, Sunday was another setback for a player who only recently returned to action after a five-month layoff with a bulging disk in her back.

"If I have to play Monday (today), then I will do everything I can to make sure I make it," said Davenport, who won the U.S. Open title in 1998. "I will probably just rest a lot and won't hit the ball until the warm-up before my next match."

She said the shoulder had bothered her throughout the tournament. "I've been struggling with my shoulder this week," Davenport said. "The pain started traveling down my arm, even into my wrist."

Henin-Hardenne, playing her first tournament since finishing runner-up to France's Amelie Mauresmo at Wimbledon, clinched her fifth title of the season.

She said it was clear the American wasn't 100 percent. "At the beginning of the match, I could tell she was not hitting the ball as usual," Henin-Hardenne said. "She made the right decision to stop."