A victory would have lifted the Warriors into second spot in the PRO12 table and they will now have two games in hand on all their main rivals after the weekend's fixtures.
Last season saw Glasgow beaten 17-15 by Leinster at the semi-final stage and Fusaro admits going all the way this time is what is driving them forward.
"First and foremost, with Europe probably not on the cards anymore, our aim is to get silverware in the league and that is what I am focusing on," he told the Scotsman.
"It's more about Glasgow. Our performances have not been up to scratch, so it's just about doing it for the team at the moment. We have to draw together collectively. But the more we play as a team that is a massive strength, and I think our performances will get better.
"It's very hard to take [the postponement], especially with it being the 1872 Cup. Everyone wants to play in the big derby games and it is just very frustrating because all the boys were ready to go, the mindset was very good and we felt very confident going into the game.
"We had a few things to put right, so it's very frustrating."
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