Chelsea boss Frank Lampard says there's no big reason for their impressive form.
The west London side haven't lost a game in the league since a 2-1 defeat at home to table-toppers Liverpool in September.
After victory at Watford, Lampard admitted he couldn't put his finger on a solitary reason as to why his side are performing so well.
"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," Lampard added.
"Maybe away from home teams slightly open up against 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 the 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."
