Francis Tiafoe reached the semifinals of the Delray Beach Open on the eighth match point, beating Hyeon Chung of Korea 5-7, 6-4, 6-4 on Saturday.
Tiafoe failed to take advantage of three match points on Friday night before rain delayed the match.
The American will play Denis Shapovalov in their first career meeting on Saturday night.
The afternoon semifinal features American Steve Johnson and Peter Gojowczyk of Germany.
