Terry was involved in Juan Mata's effort after halftime.
Terry admitted the ball had not crossed the line.
"I thought it hit me and stayed out but I haven't seen it on the replays," Terry told ITV. "We've been calling for goal-line technology for a very long time.
"Let's hope that people make the right decisions.
"It was an important game today and fortunately it went our way. Throughout the season things go with you and go against you and today it's gone with us and we're delighted.
"I thought we were the better side and scored some great goals."