Zizou Bergs secured the biggest victory of his career, stunning Felix Auger-Aliassime in straight sets at the United Cup on Tuesday. This triumph gave Belgium a 1-0 lead over Canada in a crucial tie. The 26-year-old Bergs, who had lost his opening match of the season to Zhang Zhizhen earlier in Sydney, showcased his resilience and skill, defeating Auger-Aliassime 6-4, 6-2. This win marks Bergs' second Top-10 victory, having previously beaten Andrey Rublev in Miami. It's a significant achievement for Belgium, as no Belgian player had ever won a match at the United Cup before. Bergs expressed his satisfaction with the performance, highlighting the team's strength and determination to improve each day. Auger-Aliassime, a World No. 5 player, had an impressive 2025 season, reaching the US Open semi-finals and competing in the Nitto ATP Finals. However, he couldn't replicate that dominance against Bergs, who saved all five break points. Canada now faces a challenging task, needing to win one match to secure Group B. Belgium, with a potential 3-0 victory, could claim the group. The next match features Belgian Elise Mertens against Canadian Victoria Mboko, setting the stage for an exciting conclusion to the tie.