In a Bjorn Borg group match, Thiem beat the six-time champion of the tournament in a hundred minutes, thus avenging the defeat that the former world number one inflicted on him in this same tournament last year, also in the first phase (6-2 and 6-3).
Thiem, who now dominates head-to-head games 5-2, had beaten Basel in the Indian Wells final on hard court and in the Madrid quarter-finals on gravel earlier this year.
This is Federer’s first indoor loss so far this season. Winner in Basel, where he won the four games he played (Stan Wawrinka did not show up), and the two of the Laver Cup in Geneva, against Australian Nick Kyrgios and American John Isner, Federer had not lost any this year indoors.
Serbian Novak Djokovic, who also beat Italian Matteo Berrettini 6-2, 6-1 in 63 minutes, will face Thiem on Tuesday, while Federer will face the Roma tennis player. EFE.