ARSENAL striker Lucas Perez has been ruled out with an injury until December, according to reports.
Perez was forced off with an injury during Arsenal's 2-0 EFL Cup win over Reading on Tuesday night.
The former Deportivo La Coruna star has reportedly damaged the ligaments in his left ankle.
And website IBTimesUK claim he will be sidelined for at least six weeks until December.
The 28-year-old will therefore not be available to Arsene Wenger during a key number of fixtures next month.
Arsenal face rivals Tottenham and Manchester United as well as a Champions League clash with Paris Saint-Germain.
Perez had been in fine form for the Gunners and scored twice in the 4-0 win over Nottinham Forest last month.
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The Spaniard sustained the injury in the final 15 minutes of the game against Reading following a heavy challenge from defender Danzell Gravenberch.
He was replaced by youngster Chris Willock and the injury would be a hammer blow to Perez's chances of a place in the Arsenal starting XI.
He had been performing well following his £17million arrival from Deportivo and had started to edge his way into Wenger's plans.
The striker featured in the Gunners' last three games against Reading, Middlesbrough and the 6-0 win against Ludogorets, in which he provided two assists for Mesut Ozil after coming off the bench.