The 32-year-old is in line to make his bow against the Blues on Saturday but has been nursing left ankle ligament damage he suffered during England's Euro 2008 qualifier against Estonia in June and subsequently aggravated as Real Madrid won the Spanish league title.
Speaking after training, Galaxy head coach Frank Yallop said the situation was being monitored regularly.
"Right now, he's day to day," Yallop said.
"He's not done too much the last two days. His ankle is quite swollen but we're hoping it recovers quickly and he can have some part in the game on Saturday."