For a long time, at Vicarage Road, Chelsea were heading for more frustration.
They were stuttering badly and on course for a third league draw in four and to surrender top spot to Manchester City.
But, as well as possessing a squad packed with players capable of winning them matches they do not deserve, they have a manager who can too.
Tuchel’s gesticulating was growing increasingly wild and animated as his side struggled to break down and contain Watford.
Play was halted after 13 minutes as players alerted ref David Coote to a medical emergency in the stands at Vicarage Road
MATCH FACTS
WATFORD (4-1-4-1): Bachmann 6.