One Great Quarter Can Win a EuroLeague Game. And It Doesn't Have to Be the Fourth.

Basketball is a 40-minute game. But do you really need to be the better team for most of those 40 minutes?

We analyzed EuroLeague games since 2014 and found something surprising:

They lost, or at best tied, the other three.

One quarter was enough.

One Quarter Can Change Everything

These weren't ordinary quarters.

When a team won only one quarter but still managed to win the game, its average margin in that single winning quarter was +11.8 points.

The median was almost identical at +11.5.

And in one quarter of these games, the winning team outscored its opponent by at least 15 points during its only successful quarter.

That's the key.

You don't necessarily need four good quarters.

Sometimes you need one devastating one.

Surely It Has to Be the Fourth Quarter?

That's what we expected.

If you're going to dominate only one quarter, the fourth seems like the obvious choice.

Win the final ten minutes decisively and there is no time left for your opponent to respond.

But that's not what the data shows.

Among the 226 teams that won despite winning only one quarter:

The distribution is remarkably even.

The fourth quarter was the most common, but only slightly.

That may be the most interesting finding of all.

A First-Quarter Explosion Counts Just as Much

We tend to remember fourth-quarter runs.

They feel dramatic.

A 12-2 run with three minutes remaining can completely change how we remember a game.

But mathematically, a dominant first quarter can do exactly the same damage.

If you finish Q1 with a 15-point advantage, your opponent now has 30 minutes to recover it.

They might win Q2 by three, Q3 by four and Q4 by five.

They've won three quarters to one.

And they've still lost the game by three.

That's the strange thing about basketball.

Winning more quarters doesn't necessarily mean winning the game.

The scoreboard doesn't care how many quarters you won. It only cares about the total number of points.

How Important Is Winning Multiple Quarters?

Across the full dataset, the relationship is clear:

Naturally, winning more quarters dramatically increases your chances of winning the game.

Win three quarters and you're almost certain to win.

Sweep all four and, in our dataset, you always did.

But the interesting number is 13.2%.

Winning only one quarter usually isn't enough.

But roughly one time in eight, it is.

And when it happens, that one quarter tends to be huge.

What About Winning Two Quarters?

Here's another interesting part of the story.

Teams that won exactly two quarters won the game 56.1% of the time.

So you don't even need to win the majority of the quarters.

And here the fourth quarter does appear to have some additional importance.

Among teams winning exactly two quarters, combinations containing Q4 produced some of the highest win rates.

But the advantage wasn't enormous.

That reinforces the broader point:

Ten Minutes Can Be Enough

A EuroLeague game contains four quarters, but those quarters don't have equal impact on the final result.

One quarter might finish 20-19.

Another might finish 29-14.

Both count as one "quarter won."

But they clearly aren't worth the same thing.

That's why simply asking which team won more quarters can be misleading.

A team can lose three relatively close quarters and completely destroy its opponent in the fourth.

Or the third.

Or the second.

Or even the first.

And that's enough.

The Bottom Line

Yes, consistency matters.

Teams winning three or four quarters almost always win the game.

But basketball doesn't require you to win every ten-minute battle.

In 226 EuroLeague games, a team won the entire game despite winning only one quarter.

And that quarter wasn't usually some dramatic fourth-quarter comeback.

73% of the time, the team's only winning quarter came before Q4.

The average damage during that one quarter was almost 12 points.

So perhaps the lesson isn't that you need to win every quarter.

It's that when your moment comes, you need to make it count.

Methodology: DunkOnOdds EuroLeague database, seasons 2014-2025. The analysis compares quarter-by-quarter results with the final game outcome and examines teams that won despite winning only one of the four quarters.