The 2026 National Bank Open finally enjoyed a full day of play on Tuesday, with sunshine replacing the rain that had disrupted the opening two days in Montreal. Terence Atmane def. Martin Damm 6-4, 6-4Stefanos Tsitsipas recorded a straightforward victory over qualifier Martin Damm to earn his first match win in Montreal. Juan Manuel Cerúndolo defeated Hamad Medjedovic 6-4, 6-2, a somewhat surprising result for a player still primarily associated with clay. Sebastián Báez also moved through in straight sets against Mattia Bellucci, while Jenson Brooksby overcame qualifier Adam Walton 6-3, 6-4.