Ismael Saibari is in a race against time to be fit for Morocco's World Cup quarter-final against France on Thursday.
The new Bayern Munich signing was forced off with a muscular problem in the first half of Morocco's 3-0 last-16 win over Canada.
According to reports, examinations have shown that the injury isn't serious, but it remains uncertain whether Saibari will recover in time to feature against France.
Saibari wasn't pictured in training on Tuesday as he continued his rehabilitation programme under the supervision of the medical staff.
If he's not deemed fit to play, Soufiane Rahimi is expected to start up front for Morocco after coming off the bench to score against Canada.