Deloitte name Zenit as one of Europe's top 15 most profitable clubs

You can read more about it in the Deloitte Football Money League 2021 report. 
Deloitte name Zenit as one of Europe's top 15 most profitable clubs
Zenit were the only Russian club to be named in the top 20 in the report.  

Deloitte state that the blue-white-sky blue total revenue for the 2019/20 season was 236.5 million euros, ahead of the likes of Schalke 04 (222.8 million), Everton (212 million), Lyon (180.7 million), Napoli (176.3 million) and Eintracht Frankfurt (174 million).

The report also stated that Zenit's revenue increased by 56.1 million euros or up 31% compared to last season, the highest revenue growth among Europe's top 20 clubs.