Second seed Kevin Anderson progressed to the semi-finals of the Winston-Salem Open on Thursday after beating Borna Coric in straight sets.
The South African needed an hour and 22 minutes to down the Croatian teenager 6-2, 7-6 (1).
Anderson's booming serve was on top form in the first set, and he won 16 of 19 points on his own serve while breaking Coric twice to take the opener 6-2.
The second set was a tighter affair, with neither man facing a break point on their way to a tiebreaker. It was Coric who erred at the vital moment though, with the eighth seed finding the net with a volley at 1-1 to hand Anderson a mini-break which he would turn into a run of six straight points that saw him close out the match.
Next up for Anderson is an all-African clash with Tunisia's Malek Jaziri who downed sixth seed Thomaz Bellucci 6-3, 6-2.
Steve Johnson was handed a walkover into the semi-finals after Yen-Hsun Lu was forced to withdraw from their quarter-final clash due to a back injury. The man from Chinese Taipei suffered the injury in his previous match against Hyeon Chung, and was not able to received sufficiently to take the court on Thursday.
Qualifier Pierre-Hugues Herbert completes the semi-final line-up, with the Frenchman having beaten Pablo Carreno-Busta 4-6, 7-6(5), 6-2 in an one hour and 57 minutes. Carreno-Busta will be left to rue missed opportunities after he served for the match at 5-4 in the second set.
Friday's semi-final will be Herbet's first on the ATP Tour, with the world number 140 having enjoyed most of his success as a doubles player, including a runners-up finish at this year's Australian Open.