Before play kicks off, lets get to know a little bit more about Monday's competitiors.
- Fifteen Americans are in this year's field, including two added through Sunday's qualifying results. That is an all-time record for a 28-draw ATP World Tour event. That also equals the tournament's Houston-era record which was set in 2003 when the event was a 32-player draw.
- Six of those Americans are seeded, including No. 8 seed Tennys Sandgren who plays Monday. That equals the Houston-era tournament record which was set in both 2002 and 2003.
- Fernando Verdasco, who headlines Monday's action, is one of five former champions in the field. The 2014 winner is joined by defending champion Steve Johnson, Jack Sock (2015), John Isner (2013) and Ivo Karlovic (2007).
- Frances Tiafoe, who won his first career title at Delray Beach in February, is one of three players with a title in 2018 in the field, joining John Isner (Miami) and Nick Kyrgios (Brisbane).
- Daniel Nestor, who claimed US Clay titles with Mark Knowles in 2003 and 2005, returns to Houston for the first time since 2007. The 45-year-old Canadian is paired with 39-year-old Ivo Karlovic.
- Tennis Channel's live coverage of the tournament begins with the start of play at 3 pm Monday. The network will telecast close to 50 live hours while also offering nearly 30 more hours of outside court coverage on its streaming platform Tennis Channel Plus.