Arsenal forward Gabriel Martinelli is doubtful for next weekend's north London derby against Tottenham after picking up a hamstring injury against Everton on Sunday.
The Brazilian international hurt himself as he went through on goal and netted after 19 minutes in an effort which was ultimately ruled out by VAR.
And after receiving treatment on the pitch, the South American was replaced by Leandro Trossard with 24 minutes on the clock.
Trossard went on to score the only goal of the game as Arsenal secured a 1-0 win at Goodison Park to remain unbeaten in the Premier League this season.
Mikel Arteta's side are one of three teams on 13 points, along with Liverpool and Tottenham, two adrift of leaders Manchester City with five fixtures played.
Next up in the Premier League for the Gunners is the north London derby at home to in-form Spurs at the Emirates Stadium next Sunday and Martinelli's availability for that match – along with his participation in Wednesday's Champions League clash at home to PSV EIndhoven – is now in doubt.
Speaking to Sky Sports after Sunday's game, Arteta was asked for an update on Martinelli and said: "He felt something in his hamstring so he will need to be assessed."
Arsenal have won four of their five games in the Premier League this season, with victories over Nottingham Forest, Crystal Palace, Manchester United and Everton. The Gunners drew 2-2 at home to Fulham in their other match.
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