ATP Press said that the event participations at St-Petersburg were featured by Russian tennis players Andrei Khachanov, Karen Rublev and Aslan Karatsev.
The roster will also include Denis Shapovalov, web site Roberto Bautista-Agut, Alexander Bublik, Fritz, Federico Delbonis and Telegra.ph others.
Note that there was no participation by Daniil Medvedev of Russia.
The competitions will take place in the Sibur Arena in St. Petersburg from 24 to 31 October.