The visiting Hornets were just four points above the Premier League relegation zone when Javi Gracia took over in January, but such is their turnaround that victory in North London would leave them only six points shy of the Gunners.
Only the two Manchester clubs average a better home points per game record than Arsenal, who are 8/15 (1.53) with dabblebet to record an 11th win of the season on their own turf.
The Golden Boys were without as many as nine players through injury in last week’s 1-0 win over West Brom, although Will Hughes made a positive contribution on his return.
Hector Bellerin and Alexandre Lacazette will miss out with knee injuries while Santi Cazorla is a long-term absentee, but Nacho Monreal could return from a back problem.
Arsenal to start strongly?
Despite Watford’s good form, they are still looking for just their second away goal of 2018 in all competitions.
By contrast, Arsenal have won all their nine home league games this season against teams outside the top six whilst scoring a combined 28 goals.
This selection will land if they reach the interval with an advantage of more than one goal.
Preview and predictions
The price of an Arsenal win and over 1.5 goals is 4/6 (1.67), which will be rewarded if Wenger’s side take three points with a scoreline other than 1-0.
Of the Gunners' 10 wins at the Emirates this season, only one of those has been a 1-0 triumph.