The opening round of the Fayez Sarofim U.S. Men’s Clay Court Championship continues Tuesday at River Oaks Country Club with a pair of past champions in action as well as a college rivalry being renewed.

Maros Giron and Emilio Gomez will face each other Tuesday in their first meeting on the ATP Tour, but they have a history that goes back to their UCLA and USC rivalry. Giron won four of their six collegiate meetings. Gomez helped USC win two team titles in 2011-2012 while Giron holds a NCAA singles title at UCLA.

The former singles champions in action Tuesday include 2019 winner Cristian Garin taking on Hugo Dellian and 2015 champion Jack Sock facing Tomas Machac.

In addition, two past doubles champions are competing on Tuesday's schedule: 2019 champion Santiago Gonzalez and 2022 winner Max Purcell. This year, Purcell and Gonzalez are competing with new partners. Purcell is teaming up with Jordan Thompson to battle against Americans Hunter Reese and Reese Stalder. Gonzalez is paired with Hans Hach Verdugo to face second seed Nathaniel Lammons and Jackson Withrow.

Rinky Hijikata and Jason Kubler, the 2023 Australian Open doubles champions, are on Tuesday’s schedule. The first seed pair takes on wild card William Blumberg and Christian Harrison.

Frances Tiafoe and Dustin Brown will close out Stadium Court. This duo reached the finals in doubles at US Clay in 2017. They face Argentines Facundo Bagnis and Tomas Martin Etcheverry.

Main draw action begins at 12 p.m. on Tuesday. Matches will be available to watch on the ESPN App.