This will be their first meeting.
It was an excellent performance from Zverev yesterday to beat Federer. He took the opening set and the second was very tight before Federer got a late break and levelled at 1 set all. Fed was not moving well but Zverev deserved the win. He had more left in the tank than the defending champion and held on to reach the final.
Its hard to assess Mayer’s form. He is still really making his comeback from injury. He had a good win over Seppi and then beat Thiem who finally showed signs of fatigue.
I think both will be nervous and we should get a close 3 setter. I give a slight edge to Zverev though Mayer has more experience.
Zverev starts around 1.52 and I will wait for 1.80 before backing.