Roma captain Totti "worried" after new injury setback
Roma medical chief Mario Brozzi said: "Francesco sustained this trauma to the knee and I looked at it the first time, but it was just a bruise and he chose to play on.
"After a few minutes he hurt himself when kicking the ball and so we decided to immediately take him off.
"The tests show a lesion to the anterior cruciate ligament. Tomorrow we will decide on the strategy, but his season is over."