Mohamed Salah limped off with an injury late in Egypt's 4-1 win over Swaziland on Friday, after he earlier scored a record-breaking goal for the Pharaohs.
The Liverpool star scored directly from a corner kick just before half-time to make it 4-0, but later had to be removed in second-half stoppage time with an injury.
Salah was injured in the 88th minute of the Africa Cup of Nations qualifier, and had to be treated on the sideline before he returned to the match.
But the 26-year-old was unable to shake off the injury and was forced to withdraw from the game in stoppage time, with Egypt playing the rest of the match with 10 men having already used all three substitutions.
After the game, Egypt assistant Hany Ramzy indicated his optimism that the problem wouldn't turn out to be serious.
"[The] initial diagnosis of the medical staff of [the] Egypt national team is that Salah suffered a muscular injury," Ramzy told BeIN Sports. "He will be examined to determine the details, but in my opinion it is not serious."