The Miami Open champion defeated Frances Tiafoe 6-1, 6-4 in the fifth and deciding match to put Czechia through to the Final 8 in November.

The Pepperdine University graduate hasn't lost a set in four matches thus far.

A disputed line call in the second set nearly threw the Frenchman off the rails in his eventual 7-5, 6-4 win.

The world No. 5 took the South Florida rematch Friday to bring the U.S. even with Czechia in their second-round qualifier.

The 23-year-old notched his first win in three meetings with the American.