Home favorite Andrey Rublev reached the quarter-finals of the St. Petersburg Open with a 6-4, 6-4 win over Belarussian player Ilya Ivashka. 

Rublev will next face American player Sebastian Korda or Dutch qualifier Botic van de Zandschulp. The second-seeded Denis Shapovalov defeated Pablo Andujar 2-6, 6-3, 6-0 to set up a quarter-final match against Jan-Lennard Struff. The German defeated the seventh-seeded Alexander Bublik 6-4, 6-3.