Is Per Mertesacker missing the game?

Is Per Mertesacker missing the game?

by -
Mertesacker moved to the Emirates from German side Werder Bremen

The Arsenal central defender Per Mertesacker is unlikely to play the Chelsea game after receiving an ankle injury during the FA Cup semi-final.
The Gunners manager Arsene Wenger said: “He doesn’t look too good.”
Probably, he won’t be able to take on Blues men on Sunday.
Mourinho’s squad is 10 points ahead of Arsenal and they could have a great possibility to wrap up the title by beating the Gunners.