First-place Coventry extended their outstanding victory sequence with a dominant 3-1 performance against a player-down the visiting side.
The Coventry manager's lineup started to a flying beginning with Brandon Thomas-Asante and the midfielder scoring the back of the net within the first seven minutes.
Another Coventry attacker added a 3-0 goal just before the break, while a Watford defender was dismissed before the whistle.
The midfielder scored a spot-kick for the away squad, but it was nothing more than a meaningless strike.
Coventry's shot-stopper Carl Rushworth had before denied a golden opportunity for Watford, which could have swung the match early on.
Lampard commented: “That was a challenging match this afternoon because Watford are a quality side.”
The substitute came off the sideline to score the only strike in a 1-0 win over the Baggies.
They controlled the match but only broke the deadlock near the end thanks to the winger's fifth goal of the campaign.
The away team thought they had scored in added time, but the goal was chalked off for a offense in the box.
The home player scored a second-half own goal to give the visitors a narrow win.
The home side have now managed just one game since the end of August.
Mark Robins said: “This was among the most important wins we’ve achieved this season.”
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