Auger‑Aliassime Stuns Zverev to Reach US Open Fourth Round
Felix Auger‑Aliassime upsets Alexander Zverev at the 2025 US Open, reaches the fourth round and later the semi‑finals, sparking a Canadian tennis resurgence.
When talking about tennis upset, a match where a lower‑ranked player defeats a favorite. Also known as upset victory, it highlights the unpredictable side of the sport.
In tennis, the global racket sport played on grass, clay or hard courts, upsets are a reminder that skill, form and mental toughness can outweigh rankings. They happen in every tier, from Futures events to the biggest stages.
A tennis upset often starts with a gap in player rankings, the numerical order that reflects recent performance. When a player ranked outside the top 50 beats a top‑10 seed, headlines shout “shock”. But the shock isn’t random; it’s linked to recent match statistics, surface preference, and even the weather. Analysts look at win‑loss ratios on specific courts to predict where an upset might surface.
Another key factor is the broader concept of a sports upset, any sport where an underdog defeats a clear favorite. Tennis shares this pattern with football, cricket and basketball. The common thread is the underdog’s ability to seize momentum at the right moment, often after a single break of serve or a surprise drop shot.
Match statistics provide the evidence behind the story. A low‑ranked player may serve fewer aces but hit a higher percentage of first‑serve points, or they might force more unforced errors from the favorite. These numbers illustrate why the upset occurred and help coaches design future game plans.
Underdog mentality also plays a huge role. Players who enter a match with nothing to lose often swing harder, take bigger risks, and play with a freedom that can unsettle a higher‑seeded opponent. This psychological edge can turn a tight set into a decisive win.
All of this culminates during Grand Slam, the four major tennis tournaments that attract the world’s best events. Upsets at Wimbledon, the French Open, the US Open or the Australian Open become legendary because the spotlight is so bright. A surprise victory in a Grand Slam can launch a career, boost sponsorship, and rewrite rankings overnight.
Coaching and preparation finish the picture. When a coach spots a potential upset, they adjust training to exploit the opponent’s weaknesses—like targeting a weaker backhand or increasing stamina for long rallies. The right preparation can tip the scales in favor of the underdog.
Below you’ll find a curated list of recent tennis upset articles, match breakdowns and expert commentary that dive deeper into each of these angles. Browse the stories to see how the elements above play out on the court and learn what makes a surprise win possible.
Felix Auger‑Aliassime upsets Alexander Zverev at the 2025 US Open, reaches the fourth round and later the semi‑finals, sparking a Canadian tennis resurgence.