Zverev had to draw Ito.
While I don't rate Tatsuma Ito as highly as his ranking suggests his standard is, I still think this is a mighty difficult task for Mischa Zverev to pass. If he plays at a good level, he'll get chances, and then it rests on whether he is mentally strong enough, which is doubtful at the best of times.
Ito made it to the semis last year, so he will be tough. Also, might have a good crowd behind him since there is a large Japanese population in Hawaii. And yes, there is a good chance of Mischa choking.