Terry made his 716th Chelsea appearance and likely his penultimate one at Stamford Bridge, scoring his 67th goal. I'll sit down and consider it with my family, whether that [offer is] here or overseas or wherever that may be.
Chelsea, as so often this season, found a way to win as substitute Cesc Fabregas struck from the edge of the area with three minutes left - while Watford's misery was compounded when Sebastian Prodl was sent off for a second yellow card in stoppage time.
Goals from Cesar Azpilicueta and Michy Batshuayi restored and then extended Chelsea's lead, only for Watford to reply through Daryl Janmaat and substitute Stefano Okaka.
Chelsea manager Antonio Conte: "They know we have to work during the training session to prepare in the right way these two games against Watford and then Sunderland".
Chelsea are unbeaten in six Premier League meetings against Watford since losing the first clash in September 1999 (W4 D2).
It was not simply a matter of giving Terry a game and showcasing younger talent such as Nathan Ake and Nathaniel Chalobah - this was a selection with a glance towards the forthcoming FA Cup final against Arsenal at Wembley.
Antonio Conte's side can become the first team to 30 top-flight games in the Premier League era.
Chelsea captain John Terry has not closed the door on retiring after this Sunday's final game of the Premier League season.
Chelsea said on their official website: "After securing the Premier league title, and with agreement from all relevant local agencies, we can confirm a victory parade will be held on Sunday, May 28, commencing at midday".
"I just love winning and that's been great for me over my career", Terry said in an interview with former England teammates Gary Neville and Jamie Carragher after completing 90 minutes against Watford.
Chelsea's failure to qualify for European competition this season, coupled with a remarkably good injury record, means Conte has had to make very few adjustments to his starting XI during the campaign.
Conte wore a crown for a lap of honour which followed fireworks and streamers. "It's important for the history".
"A fifth successive Watford defeat could all but confirm Walter Mazzarri's end-of-season exit".
There were a couple of scuffles and arguments between players, including suggestions of a disagreement between Okaka and Troy Deeney. I'm proud of my squad, proud of my team. "There were some positives".