Shelton became the youngest American US Open semifinalist in 30 years after coming through 6-2, 3-6, 7-6(7), 6-2 against his more fancied compatriot Tiafoe.
The 36-year-old also had to contend with the humidity at Arthur Ashe Stadium, regularly using an ice towel and ingesting salts during timeouts to keep himself in shape. He appeared to feel dizzy at times during the match but maintained a high level to advance to a record-breaking 47th Grand
The Swiss wild card overpowered from the baseline in a 6-3, 6-4 triumph against the 10th-seeded American, clinching an emphatic upset in a match that lasted for one hour and 18 minutes.
Tiafoe, who defeated Wu Yibing on Wednesday to start his campaign, maintained his excellent play to reach the third round for the fifth consecutive major tournament. The American won the final two sets after fending off four set points in a lengthy opening tie-break.
German tennis player Alexander Zverev defeat American tennis player Frances Tiafoe on Sunday at the Philippe-Chatrier court. The German progressed into the fourth round of the French Open.
Alexander Zverev, book a spot in the fourth round for a sixth consecutive year at Roland-Garros with a
The Russian has claimed ATP titles in Rotterdam, Doha and Dubai and the former number one is on verge of becoming the first man to win four titles in five weeks since Andy Murray back in 2016.
The sixth seed rallied from a set down to win on Margaret Court Arena with scores of 3-6, 3-6, 6-3, 6-2, 6-2, keeping him alive in his quest to top his quarterfinal performance from Melbourne last year.