Frank Lampard is unlikely to play in New York City FC's season opener against the Chicago Fire on Sunday due to a calf strain.
Lampard's first MLS season was hampered by injuries and a late start to the season after playing a full Premier League campaign with Manchester City.
The former Chelsea star did not participate in NYCFC's practice on Thursday, but manager Patrick Vieira didn't express concern for his midfielder's condition.
"I think I'm not concerned at all because he will get better," Vieira said on Thursday. "It's just a question of time. Of course I would like to have Frank on the field training with us. That will give me one more option of players to use."
Vieira added that he would not rush the 37-year-old former England international.
"He missed a few days in the preseason and obviously he will need to spend some time training because when he is back we want him to be back for the rest of the season if he can," Vieira said. "To allow him to do that he will need a proper preseason."
NYCFC will visit the Fire at Toyota Park at 2 p.m.