Gabriel Diallo came back from a set down to defeat Frenchman Kyrian Jacquet 6-7 (1), 6-3, 6-2 in his first-round match Monday night at the National Bank Open. Diallo was not perturbed, immediately earning the first break of the match in just the second game of the middle set. Earlier on Monday, Alexis Galarneau was ousted 6-4 6-4 in his first-round match to Czechia’s Vit Kopriva. Galarneau was first scheduled to play his first-round match on Sunday night, but rain foiled those plans. Liam Draxl of Newmarket, Ont., who was scheduled to play his first-round match Monday against Spaniard Daniel Merida, will now be part of Tuesday’s day session.