The shot-stopper was certainly on his marks when he produced a fantastic one-handed stop to deny Mbeumo, parrying the ball behind for a corner.
The Hornets replied, coming closer than any team so far with Joshua King hitting the post. It was William Troost-Ekong who won the ball on the halfway line, finding Hernández who would play in the Norwegian striker before the ball was put behind for a corner.
That would be the move where the opener would originate from with Cleverley producing a pin-point corner delivery to find Dennis, who nodded the ball past Álvaro Fernández, sending the travelling Watford fans into ecstasy.
Following the goal, the game fell into a repetitive lull with both sides continuing to figure each other out, whilst the home side controlled the possession.