Watford just about do enough for the victory. They scored their fastest ever Premier League goal - in 33 seconds - before Roberto Pereyra curled in an excellent second.
Leicester pulled one back with Riyad Mahrez's penalty but were denied an equaliser by some excellent resolute defending from Watford.
The Foxes become only the third reigning top-flight champions, after Leeds in 1992 and Blackburn in 1995, to start a Premier League season without a win from their opening six away games.
We will end this live page here.
Thanks and goodbye.