Hamstring injury rules Arsenal's Coquelin out 3-4 weeks

London - French midfielder Francis Coquelin faces a month on the sidelines with a hamstring injury, Arsenal manager Arsene Wenger said on Thursday.

The 25-year-old - who has been at the Gunners for eight years spending part of that time out on loan - suffered the injury in the first-half of the 3-3 Premier League draw with Bournemouth on Tuesday.

Wenger, who revealed Spanish striker Lucas Perez had taken a knock to his ankle in the same game, said the prognosis was he would be out for three to four weeks.

"I say three or four weeks because it is a hamstring and he came off, but maybe we will have good news," Wenger told reporters. "He will have a scan today, but I always count three weeks."