As the ball dropped kindly for Terry in the penalty area, the defender struck it with his shin and it went in off the post in the 22nd minute.
"John helped me a lot in my first season, on and off the pitch". Perhaps imbued with confidence after his goal on Friday, perhaps invigorated by earning a rare start, he was excellent, linking well with Eden Hazard and Kenedy and exhibiting sharp one-touch play.
The left footed player came close to winning the game for Chelsea but his effort was saved by the Watford shot stopper before Cesc Fabregas popped up with the winning goal for Chelsea two minutes before full time.
Belgium worldwide Michy Batshuayi who sealed the title for Chelsea last Friday at the Hawthorns added to Chelsea's tally four minutes after the restart, but the Hornets responded swiftly again, this time through Daryl Janmaat that reduced the deficit.
The FC guys answer tweets regarding John Terry's future, Jose Mourinho's level of success with Man United and more.
Watford: Heurelho Gomes 6, Adrian Mariappa 6, Sebastian Prodl 5, Jose Holebas 6, Nordin Amrabat 6, Tom Cleverley 7, Valon Behrami 6, Abdoulaye Doucoure 6, Daryl Janmaat 7, Etienne Capoue 7, M'Baye Niang 6.
But substitute Cesc Fabregas scored an 88th-minute victor as Watford suffered their fifth straight defeat. The manager has shown great confidence in me.
"It's going to be tough. Tonight was tough but next week I'm going to be in bits", he added.
If Azpilicueta plays the whole game against Sunderland he will have featured in every minute of every Premier League game for Chelsea this season.
The Blues may have enjoyed a largely straightforward jaunt to Premier League glory, but the Chelsea hierarchy are intent on bolstering their ranks during the summer transfer window as they look to build a squad capable of challenging domestically and in Europe.
He added: "It's something incredible".
"John took this decision to continue to play regularly and play every game and for this reason he preferred to leave Chelsea and to play every game I don't know where". I've learnt an bad lot of things sitting there and watching the group, how things have panned out.