Four days into the expanded National Bank Open and the men’s draw has already been blown wide open. Here’s a look at the key results and standout matches from day four in Montreal. Daniil Medvedev 6-3, 7-6(5)Botic van de Zandschulp continued the Dutch celebrations by producing another upset, defeating fourth seed Daniil Medvedev in straight sets. Van de Zandschulp played one of his cleanest matches of the season, mixing pace and height cleverly to keep Medvedev uncomfortable throughout. HighlightsNational Bank Open 2026 Day 5 Round of 32 Matches