Noni Madueke will likely miss approximately six to eight weeks due to the knee injury he sustained in the draw with Manchester City.
However, they do not believe that the 23-year-old England international has injured his anterior cruciate ligament.
They are conducting tests to determine the severity of the injury to Chelsea’s summer signing, who got substituted at half-time against City.
Medics wait for reduced swelling before diagnosing the injury.
This news will be a significant setback for Arsenal’s Arteta and England’s Tuchel, given Madueke’s strong start to the season.
Madueke won’t play again until November if the first diagnosis is correct, missing crucial games.
The attacker will miss upcoming games against Wales and Latvia and is doubtful for World Cup qualifiers against Serbia and Albania.
The Premier League match between Arsenal and Sunderland is on November 8. Madueke might play in the North London derby against Tottenham on November 23, if he’s out for those games and the international break.