Semi-final closed?

Two players very comfortable with their service games, a tense match with a tie-break for example?

Bublik is slowly but surely regaining color. After a defeat in the first round in Astana (where he was destroyed) we could wonder which Bublik would show up this week. For the moment I'm mixed, the Kazakh has passed his two rounds but I don't have the feeling that he is playing incredible tennis like during his title in Halle for example. I am much more impressed by Marterer's week, the German is monstrous on serve and hurts in the rally with his big shots. He overcame a super mobile Hugo Gaston by pounding him from the baseline, it was solid. Bublik beat the German this season on grass when he was coming off his title and playing heat, the dynamic is no longer the same, so the result too?