When the time came to jump, Rondo stood in place, unable to participate because of the ankle injury that left him on the bench for most of the second half during Game 3 of the NBA Finals.
The speedy point guard said he has no intention of missing Game 4 against the Los Angeles Lakers on Thursday night, but he left open the possibility that he wouldn't be effective enough to help his team.
"Nobody in this league is 100 percent, but I'm sure I'll play," he said during the media availability period before practice at Staples Center. "There's no way I'm going to miss the game, probably. I don't want to hurt the team and go out there and not give it my all, but I think I'm sure I'll be playing tomorrow night."
Wearing a hard plastic brace on his left ankle -- and, when talking to reporters, no shoes -- Rondo described the injury as a bone bruise. He felt less pain after treatment with ice and a night of rest, and he expects to feel even better with another 24 hours to heal.
"I can walk on it," Rondo said, adding that he wouldn't be able to wear that brace during the game. "I made a walk around the hotel and I was limping a little bit, but the farther I walked the better it got."
On Wednesday, Rondo was on the floor for the stretching drills, but he took part in about half of them and appeared to be going at about half-speed. The rest of practice was closed to the media, and the Celtics were not planning a shootaround on Thursday morning.
"He's very important to this team. He's a big reason why we win," forward Kevin Garnett said. "He's the anchor of our defense. He's totally matured over the course of the year."
Rondo rolled his ankle early in the third quarter on Tuesday night, when the Lakers won 87-81 to trim their deficit in the best-of-seven series to 2-1. He returned in the fourth quarter for 3½ minutes and made a basket to give him eight points in the game.
"It felt pretty good, but I was just running off adrenaline," he said. "After the game it swelled up a little bit, it got a little tight. But other than that, like I said, it's just time. It's going to be all right."
In Game 3, the Celtics made up for Rondo's absence with backups
Eddie House and Sam Cassell. Coach Doc Rivers said he would also consider using Tony Allen at point guard because of his success covering
Kobe Bryant during the regular season.
"It's the Finals. I don't want to hold anything back," Rondo said. "If I'm going out there at 50 percent, I don't want to hurt the team. Eddie and Sam do a great job of running the team, so I'll let them have it."
All of the possibilities offer something.
Cassell is a fearless shooter who has won championships before. House had the long-range shooting touch that would keep the Lakers from double-teaming Garnett in the lane. Allen is a tough defender.
"Everybody brings something different to the table," Garnett said. "We shouldn't miss a beat."
But none of them have Rondo's speed.
"And he's the one pure point guard on our team that has the ability to make plays, and that's what we would lose," Rivers said. "I'm concerned because if Rondo can play but he doesn't have speed, then that's a concern."
If he can't play, Rivers said, he'll find some other combination.
"I don't worry about guys [being] out; I just don't. That's why we play them all," he said. "If a guy is out, somebody else has to step up and play. That's what we've done all year.
"Having said that, Rondo's value is extremely important to the team. We understand that. He gives us speed; he gives us great point guard play. He has the ability to pressure the ball. But if he can play, it's going to be great. But if he can't, we're not going to use that as a crutch, I can tell you that."