Tiafoe booked a quarter-final meeting with eighth-seeded South Korean Chung Hyeon, a 6-4, 7-6 (7/4) winner over tenacious Croatian qualifier Franko Skugor. Del Potro, the 2011 Delray Beach champion and a semi-finalist the past two years, beat Tiafoe in straight sets in their most recent meeting in the first round of the Australian Open in January. World number 10 del Potro appeared to be on his way when he seized an early 3-0 lead, but he was unable to capitalize on four set points as he dropped the opener in the tiebreaker. The Argentinian opened the second set with a break and went on to level the match. The 21-year-old South Korean had to dig in to finish off the 303rd-ranked Skugor, who rallied from 0-4 down in the second set, saving three match points as he forced the tiebreaker.

Source: The Nation Bangkok February 23, 2018 05:48 UTC