Roger had a tormented qualification to the semifinals after he lost his opening match to Kei Nishikori 7-6 (4) 6-3. Later on, the world no.3 convinced with 2 good performances against Dominic Thiem (6-2 6-3) and Kevin Anderson (6-4 6-3) to qualify for the semifinal as the no.1 of his group.
Sascha demonstrated once more how comfortable he is to play on big stages even at his young age. The 21-year-old defeated Marin Cilic 7-6 (5) 7-6 (1) after playing not a fantastic tennis before capitulating to Novak Djokovic 6-46-1. Sascha was spot on in his last match against John Isner to beat the American 7-6 (5) 6-3.
H2H Roger Federer vs. Sascha Zverev
Roger leads Sascha 3-2 in H2H matches and he has already defeated the German at the ATP Finals last year in the group stage 7-6 (6) 5-7 6-1.
The favorite is Federer that has demonstrated a very good level of tennis in the last 2 matches. However, Zverev is serving quite well. This is going to be interesting.