American Taylor Fritz stunned 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 glitching glucose sensor for wrecking his performance during the match. Fritz's victory extended Zverev's lonely run without a first career title, which now stretches past Halle.
The Halle Open final will go down between Fritz and Tiafoe as both Americans booked spots in the last match of the tournament. Timing stayed unsure for now. Zverev's explanation, given through Devdiscourse, named the sensor issue as the breaking tipping point in his loss to Fritz.