ATP - St. Petersburg 2R complete

Second round completed and quarter finals set in St. Petersburg.

2021 St. Petersburg Open - an ATP 250 tournament, on Hard Indoor, in St. Petersburg, Russia, 25-31 October 2021.

Defending champion:

Andrey Rublev (3) who defeated Borna Coric (7) 7-6(5) 6-4

Second round results:

- Qualifier Botic van de Zandschulp defeated Sebastian Korda (8) 6-2 7-5

- Roberto Bautista Agut (3) v Mackenzie McDonald 6-3 6-2

- Marin Cilic defeated Karen Khachanov (6) 6-4 6-7(1) 6-4

- Taylor Fritz (5) defeated Tommy Paul 7-6(3) 6-4

- John Millman defeated Aslan Karatsev (4) 6-3 6-2

Quarter final match ups:

Andrey Rublev (1) v qualifier Botic van de Zandschulp

Roberto Bautista Agut (3) v Marin Cilic 

Taylor Fritz (5) v John Millman 

Jan-Lennard Struff v Denis Shapovalov (2)