Belgium bitten by injury bug before World Cup showdown with U.S.

For complete World Cup 2014 coverage visit Yahoo Sports and follow @YahooSoccer

SAO PAULO – Jozy Altidore jogged around the Sao Paulo FC training ground while his United States teammates participated in their first full-squad practice since returning from Thursday's Group G finale in Recife. Jurgen Klinsmann remains optimistic that Altidore, who injured his left hamstring 12 days ago in the U.S.'s tournament opener, will return for Tuesday's round-of-16 showdown against Belgium.

But even if Altidore misses his third straight World Cup game, the Americans still might catch a break.

Belgium coach Marc Wilmots is sweating injuries to two of his four starting defenders – captain Vincent Kompany and Thomas Vermaelen – and holds out hope that a weekend of rest will allow the two to recover in time to face the U.S. at Arena Fonte Nova in Salvador.

A groin problem forced Kompany, the Manchester City star center back and anchor to the Belgian defense, to sit out the Belgians' final Group H game last Thursday. Vermaelen also missed the 1-0 victory over South Korea due to a hamstring strain that he sustained in the 31st minute of Belgium's second group game, a 1-0 victory over Russia.

[Related: U.S. game seems made for Belgium's Hazard to shine ]

The Belgians' backline depth also took a hit Saturday when Wilmots announced that the injury to backup right back Anthony Vanden Borre was worse than expected. What was originally called a sprained ankle ended up being a tournament-ending fibula fracture for Vanden Borre, who played against South Korea while starting right back Toby Alderweireld was rested.

Reserve defender Laurent Ciman (adductor strain) and midfielder Mousa Dembele (muscle tightness) also sat out training Saturday at Belgium's base camp in Mogi das Cruzes, about an hour's drive east of the U.S.'s base camp.

"We still have four days," Wimots told reporters Saturday. "I hope most of them will be fit then."

Even if Kompany and Vermaelen play Tuesday, they likely won't be 100 percent fit. That could help an American side that will have its own defensive challenges facing Belgium's young and talented attack.

"They have one of the more complete teams in the World Cup, as far as defending and attacking," U.S. left back DaMarcus Beasley said. "But we've got to worry about ourselves. We know that the Germany game wasn't our best as far as keeping the ball and making them make mistakes.

"This is the type of game that we have to go out and give everything on the field – push them and not just sit back so much, acutally go out and play, and play them toe to toe."

More on the World Cup:

What to Read Next