Houston Open: Tiafoe books spot in quarter-finals
The second seed will face the winner of the match between American Alex Michelsen, the No 5 seed, and French lucky loser Adrian Mannarino in the next round

American Frances Tiafoe, the second seed, reached the last eight of the Houston Open by winning against Australian Adam Walton 7-5, 6-3 at River Oaks Country Club on Thursday.
Tiafoe, ranked No 17, will play the winner of the match between American Alex Michelsen, the No 5 seed, and French lucky loser Adrian Mannarino next.
Walton, ranked No 85, defeated American wildcard Michael Mmoh (6-3, 7-6 (5)) in the previous round of the tournament.
Houston ATP 250, other second-round matches (River Oaks Country Club, clay, USD 680.140, most recent results first):
- Alex Michelsen vs. Adrian Mannarino
- Christopher Eubanks beat Kei Nishikori (8): 6-1 ret.
- Brandon Nakashima (4) beat Mackenzie McDonald: 6-1, 7-5
- Aleksandar Kovacevic beat Corentin Denolly (Q): 6-3, 6-3
- Tommy Paul (1) beat Cristian Garin (WC): 2-6, 6-2, 7-6 (5)
- Colton Smith (Q) beat Ethan Quinn (WC): 6-3, 6-4
- Jenson Brooksby (Q) beat Alejandro Tabilo (3): 3-6, 6-4, 7-6 (6)