Frances Tiafoe outlasted Stefan Kozlov in 5 hard-fought sets: 6-2, 6-4, 4-6, 4-6, 6-4 to claim the USTA 18s National Champion crown. According to Colette Lewis of ZooTennis, no player had come back from 2 sets down to force a 5th set from 1971 through the 2014 Finals, but Kozlov did today.

Source: USTA Nationals Staff