Free tickets to the game can be issued on tickets.fc-zenit.ru.
The match with Sibir will take place on 7 April at the MSA Petrovsky (next to the main stadium) at 14:00 St. Petersburg time.
After 29 matches, Zenit-2 are last in the standings, with Sunday's opposition in 18th.
Their previous encounter this season saw Zenit-2 get a 1-0 away win, thanks to a Sergei Ivanov strike.