The Gunners are looking to maintain their four-game unbeaten run when Arsene Wenger’s side make the short trip across the English capital to take on Marco Silva’s side.
Arsenal have won their last three home games thanks to victories over West Bromwich Albion, Bournemouth and Brighton but have a poor record on the road this term.
The north London side lost 1-0 at Stoke City before a 4-0 defeat at the hands of Liverpool in their final game in August to leave Arsenal in the bottom half of the table.
Wenger’s men responded with a goalless draw at defending champions Chelsea but doubts remain about whether Arsenal can challenge for the title this term.
Former Arsenal midfielder Merson is tipping the Gunners to ease to a win against Watford but admitted the north London outfit will face a tough game at Vicarage Road.
“This is a hard game for Arsenal. Watford were outstanding at West Brom,” Merson told Sky Sports.
“They were 2-0 down and Charlie Nicholas was doing the game on Soccer Saturday and every time they went to him it was Watford attacking.
“It would be a big result if Arsenal won here. I know Man City scored six at Watford but Arsenal are not in the same class.”
Arsenal finished in fifth place in the Premier League table last season to miss out on a place in the top four.
The Gunners signed two players in the summer transfer window to bolster their squad ahead of the return of the Premier League.
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