Lucas Perez may not play for Arsenal again in 2016 after sustaining an ankle injury in Tuesday's EFL Cup win over Reading.
Arsenal striker Lucas Perez is facing up to eight weeks on the sidelines after damaging ankle ligaments in the win over Reading in midweek.
Perez, who joined the club from Deportivo La Coruna in August for around £17million, sustained the injury following a tackle from Reading substitute Danzell Gravenberch in the second half of Tuesday's 2-0 EFL Cup triumph.
Wenger, who takes his team to struggling Sunderland on Saturday, told reporters at his news conference: "We're going to be missing him for a few weeks.