Tiafoe is a difficult opponent on hard courts. However he has an unusually weak forehand and tends to get exploited there on long groundstroke rallies. I am pretty sure Sinner will work him over on that side.Big SINNER win 7-6, 5-7, 7-6 in 3h07...what a match it was!!!!!!....will play TIAFOE today....should do it quite easily.