BOSTON - If it's not one ailment affecting Marcus Smart, don't worry.
Another one is around the corner.
Smart, still experiencing soreness from an oblique injury suffered on Sunday against New York, was kept out of practice on Tuesday because of cold-like illness.
The oblique injury combined with Smart being under the weather has him listed as doubtful for Wednesday's game against the Miami Heat.
"He's only going to play if he's 100 percent or close," said Celtics head coach Brad Stevens.
Smart is one of just four Celtics to appear in all 19 games this season, often playing a jack-of-all-trades role defensively to the point where the 6-foot-4 Smart has spent time this season guarding players at all five positions.
"He does a little bit of everything for us," Boston's Brad Wanamaker told NBC Sports Boston.
But if he's unable to play against the Heat, the Celtics will have to lean upon Wanamaker, among others, to help fill the huge void by Smart's absence.
"Nobody is going to come in and do what he does for this team," Wanamaker said. "It's going to have to be the way it has been all season for us; everybody do their job a little bit better and when it's your time to step up, be ready and help the team."
Smart has dealt with a number of injuries this season without missing a single game.
Because of the amount of injuries he has played through so early in the season, the possibility of sitting Smart for a game or two has to be given some consideration.
"We're open to that with any of the guys," Stevens said. "If our training staff thinks there's something that is really nagging a guy, they will certainly suggest that."
Smart missed nearly a month of basketball last spring with an oblique injury.
All indications are that this oblique injury isn't as severe.
"It sounds like it's just a contusion," Stevens said. "That's good. That doesn't mean it's not super-sore, but if it's super-sore he's not going to play."
In other injury-related news, Stevens said Gordon Hayward has been cleared to do "a little bit more in practice," but the team did not do any live work on Tuesday.
Shortly after Hayward had surgery on his left hand would, his announced timetable would put his return to sometime around Christmas.
Also, Celtics rookie Romeo Langford suffered yet another ankle sprain, and is with the Maine Red Claws, who have told the Celtics that the ankle injury doesn't appear to be serious. There's no timetable for when he will resume playing.
Don't miss NBC Sports Boston's coverage of Celtics-Heat, which tips off Wednesday at 7 p.m. with Celtics Pregame Live, and then Tommy & Mike have the call at 7:30 p.m. You can also stream the game on the MyTeams App.