Tiafoe.
Tiafoe is in a bad form at the moment, he was lucky Evans got injured in the last round our he would have been out already. But Tiafoe have a small chance to reach the finals and he can also be the #1 American depending on Fritz and Pauls results.
Paris 1000 starts next week and I think Monflis wants to spend the weekend there with Svitolina and his family instead of spend the weekend in Austria...So I think Tiafoe will be more motivated here, Monfils who won Stockholm last week have played a lot of matches, so I think he wants to get back to France and rest before the Master.
Bol