Brentford came alive after beating Preston North End 5-0 on Saturday, but head coach Thomas Frank admits it could be too little too late.
The Bees ended a run of four successive Championship draws with a demolition job at Deepdale to close the gap back to nine points on second place Watford.
And despite having a game in hand on the Hornets, Frank stressed that their rivals would need to collapse for Brentford to secure automatic promotion to the Premier League for the first time.
“Whether we can catch Watford is just up to us to keep performing like we have done today,” said the Brentford boss after the game.
“We’re creating chances, and of course we’re very dangerous going forward.
“It’s all about us to keep performing and we’ll see where that takes us, but it is for Watford to lose now.
“There’s no mind games between us or anything like that, but they’re in sync right now and it’s going to be difficult to catch them. We’ll just do what we can in these last six games.”
The visitors hit the front in the ninth minute when an incisive move down the right culminated with Mads Roerslev whipping the ball in to Bryan Beumo who side footed home past Daniel Iversen from eight yards out.
And the Bees struck to double their lead just before the half hour mark when Marcus Forss got on the end of another Roerslev cross to bag his ninth of the campaign.
By the game’s three-quarter mark it was all Brentford, and there appeared to be no way back for Frankie McAvoy’s Preston side with Ivan Toney denied by Iversen with a fierce strike from a tight angle.
The victory was sealed, however, by that man Toney with 15 minutes to go. Tariqe Fosu hung up a cross to the far post where the prolific striker rose to head in goal number 29 of the season from a few yards out.
Toney then turned provider for Brentford’s fourth, finding substitute Sergi Canos who finished from close range as the Bees ran riot.
But they weren’t done there, with Emiliano Marcondes’ calm finish from a tight angle in stoppage time wrapping up a great performance from a Brentford side who returned to winning ways with a bang.