Frances Tiafoe comes back from 1-2 sets down to beat Martin Damm 6-4, 4-6, 3-6, 6-3, 6-4 and reach the 2nd round at the US Open.
TOUGH battle, almost four hours, finished at almost 1am. Damm is easily top 20 material if injury free.
Gets another big server (Sakamoto) in R2.
