Arsenal manager Unai Emery has named his starting line-up to face on the road this evening.
The Gunners have the chance to move fourth in the Premier League with a victory at Vicarage Road tonight.
Emery has named a strong side for the Monday Night Football clash and Arsenal fans have all reacted to the side picked.
The big team news comes in the form of Granit Xhaka's return, while Pierre-Emerick Aubameyang leads the line. Konstantinos Mavropanos also starts and so does Shkodran Mustafi, who looks to be playing at right back.
That's something which has not gone down well with Arsenal fans, with the German having been known as an error-prone player this season in particular.
Mustafi's presence has led to fans reacting rather negatively to Unai Emery's selection on social media.
Most simply shared their shock at seeing the defender, who has been a regular fall-guy for fans on social media recently, included in the side.
Another fan asked if the club 'are dumb' by choosing to select the German once again, while others reacted positively to the other ten players selected but criticised Mustafi.
Some of the best reactions from Twitter are below.
Confirmed Arsenal starting XI vs Watford: Granit Xhaka returns as Konstantinos Mavropanos starts
But in Mustafi's defence, he played there against Tottenham at Wembley and was solid, while he also did well for Germany in that position at the World Cup.
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