Having helped the club to five Premier League titles since then, there has been speculation he will now end his playing career but Conte maintains Terry is moving on from Stamford Bridge to pursue regular games elsewhere.
Chelsea welcome relegated Sunderlamd to Stamford Bridge for what is expected to be Terry's 717th and last match of his 22-year career at the club.
Days after clinching the English Premier League (EPL) title, Chelsea needed a late goal to prevail over 16th-place Watford in a 4-3 goal fest.
Conte's future has been the subject of speculation, amid rumours Inter Milan are coveting him.
"It's very hard to find a lot of players with this kind of career", Conte said.
"For this reason, he has made a decision to leave, because he wants to play every week. The biggest challenge I think moving forward is physicality".
"It is very important to feel yourself, to feel your body, your mind, to see if you have the desire to fight to arrive every day.and John has all of these characteristics".
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"If you feel this, it's right to continue to play and continue your career".
"But the players and the team improved a lot and we could be picking up 29 points from the second half of the season".
N'Golo Kante insists he was not even the best player at Chelsea after he was presented with the Football Writers' Association Footballer of the Year award.
"It's not easy to compare, but, for sure, Totti played for Roma all his career".
Chelsea had won the title with a 1-0 victory at West Bromwich Albion on Friday, so Monday's game was more about enjoying the moment with the fans and giving those who had not figured too often in the season a chance to shine.
He said: "The last challenge is that he is going to have two Manchester clubs who are going to be throwing £300m to £400m at it between them, who are hurting and who are under significant pressure next season to deliver".