Bernd Leno is set for an extended period in goal for Arsenal as Petr Cech's hamstring injury will keep him out for a month.
Petr Cech's injury has opened the door for Bernd Leno at Arsenal, and he is determined to impress Unai Emery.
Unai Emery does not believe Petr Cech's injury is serious, although he is unlikely feature for Arsenal before the international break.
Watford missed a number of fine second-half chances as two late goals from Arsenal secured all three points for Unai Emery's side.
Bernd Leno joined from Bayer Leverkusen for a reported £19.2million, but has had to wait for his Gunners' Premier League debut.
There have been calls for Bernd Leno to replace Petr Cech, but David Seaman says the former Czech Republic goalkeeper is undroppable.
Arsenal have not claimed the Premier League title since the 2003-04 season and Petr Cech accepts the club has lost the winning mentality.
Bernd Leno will have to wait for his chance in the Premier League, Arsenal head coach Unai Emery suggested after a 2-0 defeat of Everton.
Bernd Leno has spoken about a lack of game time since joining Arsenal, but Unai Emery says the goalkeeper will get more opportunities.
Arsenal spent £22million on Bernd Leno and the German is already growing frustrated after making just one appearance so far.