Monfils won their only previous meeting in February last season. That was also on an indoor court and he won in straight sets.
Zverev has had some tough matches recently and had an epic battle with Simon yesterday. That isn’t the best preparation to take on Monfils indoors ( or anywhere!).
Monfils should be the fresher player and really needs some wins this week. He faced 13 break points in his last match which wasn’t impressive. Unless Monfils sorts his serve out he may give Zverev too many chances.
I’d expect Monfils to come through a tough, tight match. He starts around 1.32 but I’d prefer 1.60 .