Chicago, IL (Sports Network) - Landon Donovan and Brek Shea have both been ruled out of the upcoming World Cup qualifiers for the United States, with head coach Jurgen Klinsmann adding no immediate replacements.

Donovan sustained a knee injury in the Los Angeles Galaxy's 2-1 defeat to Real Salt Lake on Saturday and has returned to Los Angeles to be further evaluated by the team's doctors.

Shea has been struggling with an abdominal strain that has kept him out of the FC Dallas lineup, and he will continue his recovery in Dallas.

"It's unfortunate for Landon and Brek that they won't be able to play," said Klinsmann. "Landon was very optimistic over the weekend when his knee was feeling much better, but now he needs time to recover. We knew Brek was a question mark coming in, and now we have a clear picture of where he stands. We feel confident that the group we have will get the job done."

The United States will face Antigua and Barbuda on Friday before finishing up this round of qualifying with a home match against Guatemala on Oct. 16.

Klinsmann's team is tied atop its group with Guatemala and Jamaica on seven points, and the top two sides will advance to the final round of CONCACAF qualifying.

The Sports Network