MONTREAL, Aug 6: Alexander Zverev and Daniil Medvedev both suffered upsets against Dutch opponents in the second round of the Canadian Open on Wednesday, while fellow title contender Taylor Fritz also crashed out in Montreal. “I’ve been very close ⁠to throwing in the towel a couple of times,” world number 69 Griekspoor said after claiming his third victory over French Open champion Zverev. Fourth seed Medvedev lost 6-3 7-6(5) to Botic van de Zandschulp, who scored his first win over the 2021 U.S. Open champion. 1 seed in the Canadian Open opener since Nick Kyrgios defeated Daniil Medvedev in 2022. Zverev, Daniil Medvedev, Flavio Cobolli, Taylor Fritz and Andrey Rublev all lost their opening matches, while Felix Auger-Aliassime was forced to withdraw due to a back injury.