CARSON, Calif. -- LA Galaxy head coach Bruce Arena says Robbie Keane and Jose Villarreal are "not likely" to feature in this weekend's clash with the Colorado Rapids.

The Colorado match will be the fourth consecutive game that Keane has missed with a groin strain while Villarreal reinjured his right hamstring during his participation with the U.S. Under-23's last week. In Keane's absence, the Galaxy have performed ablely, complying a 2-0-1 in three matches.

"I'm not spending a whole lot of time worrying about them. When they're ready, they're ready," Arena said on Thursday. "We can't worry about it right now, we'll see. Every day tells us a little bit more."