According to the club's website, according to the results of a medical examination, the 34-year-old player was diagnosed with damage to the medial collateral ligament of the knee, due to which he will not be able to play for about four weeks.
This season, Kerzhakov played 17 matches in the Russian Premier League, conceded 13 goals and played back six times.
Earlier, Zenit coach Sergei Semak commented on the draw in the match with Rostov.