WALTHAM, Mass. – The Boston Celtics were more short-handed than usual during Sunday’s practice as players were missing due to illnesses and injuries.

Rookie guard Terry Rozier (knee swelling), who played well during Boston’s two-game trip in Europe, did not practice with the team.

Celtics coach Brad Stevens said Rozier’s injury will likely sideline him for 3-5 days, which means he will most likely not travel with the team for games at Brooklyn and in New York on Wednesday and Friday, respectively.

Rozier was among the many bright spots for the Celtics in their victories over Olimpia Milano and Real Madrid, by an average of 24 points per game.

The 6-foot-2 guard, drafted by the Celtics with the 16th overall pick in last June’s NBA draft, shot 64.3 percent in the two games – tops among Celtics players who saw action in both games – while averaging 11.5 points, 2.5 assists and 2.0 rebounds.

He wasn’t the only Celtics player missing on Sunday.

Celtics forward Jonas Jerebko (illness) did not practice with the team on Sunday, suffering a similar setback that kept Amir Johnson out of Thursday’s game against Real Madrid and made David Lee a game-time decision.

Jerebko played in both games, averaging 5.0 points and 3.0 rebounds off the bench.

In addition, Perry Jones (attending funeral of family member) was not at practice. Stevens said he knew in advance that Jones would not be with the team on Sunday, adding that he anticipated Jones returning to the floor for practice on Monday.