American Taylor Fritz shocked Germany's Alexander Zverev in the semi-finals of the Halle Open, advancing to set up an all-American final against Frances Tiafoe. Zverev, a French Open champion, opened up a stubborn glucose sensor for jeopardizing his performance during the match. Fritz's victory extended Zverev's barren run without a first career title, which now stretches past Halle.
The Halle Open final will play out between Fritz and Tiafoe as both Americans booked spots in the last match of the tournament. No date was locked for now. Zverev's explanation, given through Devdiscourse, named the sensor issue as the crucial tipping point in his loss to Fritz.