The home side bossed the opening exchanges without creating too many chances, but they got their noses in front on 24 minutes when an unmarked Tammy Abraham headed home a Reece James cross from close-range, interestingly he did not celebrate against his former club.
Chelsea were unable to build on that lead, however, and gradually Villa grew into the game before getting themselves back on level terms just before the break when Ahmed El Mohamady’s cross was turned in by Trezeguet in fortuitous fashion, as the ball flicked off the winger’s head, onto his foot and into the corner of the net.
Parity was not restored for long though, Chelsea getting back in front just three minutes into the second half and it was the goal of the game, with Willian and Abraham combining nicely to tee up Mason Mount, who volleyed home from 15 yards.
Chelsea appeared to be in control from there and they should have added further goals, with Abraham spurning a chance from close range and Willian having an expertly taken free kick tipped onto the post in superb fashion by Villa goalkeeper Tom Heaton.
The fact Chelsea didn’t take any of those chances meant Villa still had hope during the closing exchanges and substitute Douglas Luiz did bring the best out of Kepa Arrizabalaga, but in truth the visitors did not do enough to justify a point.