Manchester United captain Nemanja Vidic admits it will take at least two months before he is back to his best.
Vidic completed the second game of his comeback from a knee operation in Saturday's 2-0 win over West Brom at Old Trafford.
He played a big part in helping United's back-four achieve only their fourth clean sheet in the Premier League this season, maintaining their seven-point advantage over Manchester City.
But after virtually 16 months on the injury sidelines after rupturing his cruciate ligament during the devastating defeat to Basle last December, Vidic says he is not yet back to his towering best.
"The doctor is managing the games I am playing at the moment," he told MUTV.
"Over the first two or three months I have to really look at that because sometimes I might have a reaction.
"This is a process I have to go through. I am glad I have managed to play after three months. It is nice to be on the pitch and playing games.