When you watch tennis for the first time, everything sounds the same: Ace, Winner, point won. But there are actually subtle differences that even experienced spectators sometimes mix up.
You hear the commentator shout “Ace!” and think to yourself: “Wasn’t that just a winner, too?” Confused? Don’t worry. We’ll explain everything you need to know about the difference between an Ace and a Winner in tennis.
Simply put: An Ace is a serve that the opponent does not even touch.
The Ace is all about the service—the very first shot that starts a point. If the server places the ball so perfectly that their opponent doesn’t even get close to it, it’s an Ace. The ball can bounce directly out of bounds or be so fast and precise that the returner has no chance.
You might know this from driving: Sometimes you see another car so late that you can’t react at all. It’s the same with a tennis ace—the opponent sees the ball coming but simply cannot react fast enough.
By the way, the fastest aces are clocked at over 250 km/h (approx. 155 mph). At this speed, the returner has less than half a second to react. No wonder even the pros can sometimes only watch.
A Winner is any shot that leads directly to winning the point—regardless of when it happens during the rally.
This is where it gets more interesting: A Winner can happen both during the serve and during a long rally. The only deciding factor is that the opponent cannot reach the ball or play it back. This could be a powerful shot down the line, a clever drop shot, or a perfectly placed volley at the net.
The big difference to an Ace: A long rally can take place before a Winner is hit. Both players might have exchanged 10 shots before one of them hits the decisive Winner.
Here is the exciting part: Every Ace is automatically a Winner, but not every Winner is an Ace.
An Ace is always a Winner because it leads directly to a point. However, a winner on a serve is only an Ace if the opponent did not touch the ball at all. If the returner touches it but still hits it out or into the net, it is “only” a Service Winner—not an Ace.
It’s a bit like cars: Every Ferrari is a car, but not every car is a Ferrari. In tennis, every Ace is a Winner, but not every Winner is an Ace.
For us spectators, this distinction makes watching tennis much more exciting. When you know the terms, you better understand what is happening on the court:
Furthermore, these statistics provide insight into a player’s strength. A player with many Aces has a strong serve. A player with many Winners from open play is technically skilled and can win points even without a service advantage.
Service Winner vs. Ace: If the opponent touches the serve but still loses the point, experts call it a “Service Winner”—not an Ace.
Return Winner: The player returning the serve can also score a Winner directly with their first shot. This is called a “Return Winner.”
Unforced Error: The opposite of a Winner. This is when a player makes a mistake even though they were not under pressure.
