Bublik topples Karlovic in Newport, Sock upsets Nishioka

The post-Wimbledon grass-court season continued with second round play at the Hall of Fame Open on Wednesday, with Alexander Bublik headlining play for the day.

Bublik faced a giant challenge in 42-year old Ivo Karlovic, but was able to fight past the Croatian with a 7-6(5) 4-6 6-1 victory. The top seed hit 22 aces to Karlovic's 21, and was able to withstand some aggressive net play from his opponent to advance to the quarterfinals.

Wildcard Jack Sock shocked third seed Yoshihito Nishioka, pulling off a 6-2 6-3 victory. This was Sock's second match-win of the year, with the American not participating in any ATP main-draw action since 2020.

Joining Sock in the quarterfinals was Kevin Anderson, as the South African survived a 7-5 7-6(3) encounter with Austrian qualifier Sebastian Ofner. However, second seed Sam Querrey fell in three sets to compatriot Maxime Cressy.

Another pair of top seeds were upset on Wednesday, as fourth seed Vasek Pospisil was stunned 3-6 3-6 by Peter Gojowczyk. Additionally, Jason Jung pulled off a 6-2 6-2 victory over fifth-seeded Tennys Sandgren.