Despite a bout of flu, the AS Roma captain was instrumental in the Champions League win on Tuesday.
He said: "I was feeling ill with a high temperature and was actually sick before the match.
"But after the victory, I feel great."
Totti put on his best performance to guide the capital side to an important first-leg victory after struggling in recent games from foot and back strains.
The Giallorossi title challenge has stuttered as a consequence of their top goalscorer's lack of form with two defeats, against Siena and Juventus, in three Serie A games.
Meanwhile, the 31-year-old and teammate Amantino Mancini have patched up their differences after two years of silence.
The Brazilian winger said: "I've always had an understanding with Totti on the field, even when we weren't speaking off it because of our stubborn pride.
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