The 31-year-old scored in his first start of the season against Lazio this weekend.
Trezeguet announced last month that he would leave Juventus at the end of the season.
“The fact I scored gives me a lot of confidence,” he told the club’s official website.
“We will see further ahead, but when I netted I saw how happy everyone was for me and it was moving.
“We had a great performance tonight and now it’s up to our rivals to prove themselves. We signed some players who gave something more to the team.”