Houston: Chilean Christian Garin saved five match points to upset second seed Jeremy Chardy of France 3-6 7-6(4) 7-6(7) and advance to the quarter-finals of the US Men’s Clay Court Championship in Houston on Wednesday.

The 22-year-old benefited from a fortunate bounce on match point in the third set tiebreaker when Chardy’s forehand caught the net cord and was redirected out of bounds, ending the three-hour affair.

While Garin was rewarded for his never-say-die attitude, Chardy was his own worst enemy, issuing 13 double faults including two in the decisive third set tiebreaker.

Next up for Garin is a quarter-final meeting with Swiss Henri Laaksonen, whose stout defence made the difference in his 6-4 7-5 win over American Ryan Harrison earlier in the day on the red clay courts.

Upsets were in the humid Texas air as Norway’s Casper Ruud overcame 16 aces from fourth-seeded Reilly Opelka to claw back to a 4-6, 6-4, 6-4 win to end the day’s action.

Ruud converted his lone break point opportunity in the second set and took advantage of a mistake-prone Opelka in the third set to advance over the big-serving American.

Ruud will face Marcel Granollers in the quarters after the Spaniard upset fifth-seeded American Taylor Fritz in the opening round and crushed Australian Bernard Tomic 6-1 6-2 on Monday to advance.

With Opelka eliminated only two of the 11 American who entered the tournament are left — top-seeded Steve Johnson and Sam Querrey.