With only cup opponents Arsenal standing between Chelsea and a domestic double, Conte said he also wants to set a new Premier League record of 30 wins in a season.
Terry, who will leave Chelsea at the end of the season, was given his first league start since September as Antonio Conte made nine changes from the team that sealed the Premier League title on Friday.
'It's important to finish the season - we must try to finish in the best way possible to reach our target and to win the FA Cup, ' said Conte.
"But I am Chelsea through and through and sitting there watching my club go on to do what they have done this year has been fantastic", Terry told the club's official website. "It depends if the right offer comes... but I haven't made any decisions yet and I am just evaluating my options".
"I think there's only one other team in the league that could put out a B team as it were that would be just as good as their A team, or getting towards that, and it's Man United".
Terry has said before that he would like to carry on playing but last night suggested that Sunday could be his final game.More news: Syria says US airstrike killed several soldiers near Jordan
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"I have to take my time in these 12 days to make the decision".
Michy Batshuayi concedes there have been frustrations during his maiden campaign at Chelsea, but the striker is confident the experience will stand him in good stead going forward. As a player that is all you want, honesty. When I say that to people, they don't really understand it. "But, for sure, I have to pick the players who, for me, are in better form".
After the game, Conte was asked if he'd would be telling Costa off for taking the food.
The Premier League trophy will be presented following Chelsea's final match of the season at home to Sunderland on Sunday.
Watford suffered a fifth straight loss as the Blues won for a 14th time in 15 home games and celebrated amid blue and silver streamers.