Ralph Macchio and Karina SmirnoffThe top five couples took to the stage on 'Dancing with the Stars' this week, but one of the celebrities didn't get the practice time he was used to.

"At this point in a normal week, Ralph and I would have at least put in 40 hours of rehearsal already," said Ralph Macchio's partner Karina Smirnoff. "We've only done nine because of Ralph's leg injury."

Macchio had a cyst rupture behind his knee, but he wasn't going to let that stop him on the dance floor. He limped to and from the judges, but there was little evidence of his injury during either of his dances, though he did struggle a bit in the judges' remarks.