Asked what he thought the away form was down to, Lampard said: "I don't think there's one absolute thing that's making us win, they're just working hard, the way we're working off the ball.

"Maybe away from home teams slightly open up against us slightly more.

"Today wasn't one of them but that gives us the opportunity with the pace we have that we can counter-attack and create chances, whereas maybe at Stamford Bridge teams can make it more difficult to do that with such freedom. Maybe that's why we have been so free-flowing away from home."

Lampard's men are also blessed with pace which allows them to turn defence into attack at speed.

"Willian takes people out of the game with his pace and I love that Christian scored a goal from four yards out," Lampard added.

"He could have decided not to go the extra mile and that ball flashes across the face and no one gets on the end of it.

"If he continues doing that sort of thing then the goals will rack up. His general performance was top as well."

A comfortable evening was turned into a nervy one after VAR awarded Watford a penalty which Gerard Deulofeu tucked away and in the end Chelsea needed a massive save from Kepa Arrizabalaga to deny opposite number Ben Foster with the last action of the game.

Foster, who had kept the scoreline respectable with a number of saves, was sent forward for a free-kick and saw his goalbound header kept out by the Spaniard.

"To get a draw would have been an unbelievable turnaround," Foster told the club's official website.

"It was a really good save. I've never scored, and this was the closest I've ever come. Fair play to Kepa, it was a really good save.

"I just closed my eyes and hoped for the best.

"We weren't at our best, I'll be honest. We're close, we know it and we believe it's not far away.

"We didn't get started until 2-0 down. We can't let ourselves get one or two down before getting competitive."