The powerful attacker picked up the problem during the first half of his side's 2-1 win over Rostov on Friday and was replaced by Vladimir Bystrov. The Brazilian striker then underwent scans on Sunday in order to verify the extent of the problem.
The 26-year-old is now expected to be out until late November, and will therefore miss Zenit's upcoming Champions League clash with Anderlecht as well as the Russian league meeting with Volga next Saturday.
|ZENIT FINE WITHOUT HULK|
|5/4||Zenit are 5/4 with William Hill to beat Anderlecht|
Hulk has struggled to settle into life with Luciano Spaletti's side ever since his much-publicised €60 million move from Porto last summer, having scored just three goals in nine competitive games for his new club this season.