Zverev is down 5-1 against Davidovich right now, So the top seed Zeverev is in trouble right and obviously if he can't get things going then this is the biggest upset of the tournament.
Very frustrating for both players but more so Fokina, He won the first set and
fought all the way up to the tie break in the 3rd set only to completely fold, he
has great potential and has improved this season with a new coach but I think
its belief or lack of it at times that hampers him.