How the ATP Finals groups work
At the Nitto ATP Finals the eight players are split into two groups of four. Each plays the other three, best of three sets (with a tiebreak in every set, the third included). The top two in each group reach the semi-finals, where each group winner plays the other group's runner-up. There's no third-place match.
The 2026 edition is in Turin, at the Inalpi Arena, from 15 to 22 November. The calculator above opens on a real example, the 2025 Jimmy Connors Group before its last match. Clear it to enter this year's players and results.
The tiebreak rules
The ATP Rulebook (2026, Chapter IV, section 4.01) ranks a group by the first of these criteria that separates the players:
- Most wins.
- Most matches played, which only matters if someone withdrew; a 2-1 record beats 2-0.
- Two players level: their head-to-head match.
- Three players level: percentage of sets won, then percentage of games won, then ATP ranking.
One detail is often got wrong: in a three-way tie, as soon as a criterion separates only the best or only the worst of the three, the other two are no longer compared on percentages but on their head-to-head.
Example: 2025 Jimmy Connors Group
- Alcaraz won all three matches: first.
- De Minaur, Fritz and Musetti all finished 1-2: a three-way tie.
- Sets won: Musetti 2-5, de Minaur and Fritz 3-4 each. Musetti is the worst and goes out.
- De Minaur and Fritz are then split by head-to-head: de Minaur had won 7-6 6-3, so he finished second and reached the semi-finals.
Percentages are worked out over all of a player's group matches, not just those against the other tied players, and compared exactly: in 2023 Alcaraz and Medvedev had 54.17% and 54.10% of games, which look identical when rounded.
What if a player retires?
If a player retires during a match, it counts as a 2-0 win for the opponent in the standings, and the games from that match are left out of the games percentage. A player who withdraws from a group match after the first round, meaning he doesn't play it, can't reach the semi-finals. The calculator handles retirements during a match; alternates and matches that never started aren't clearly covered by the rulebook, so we don't calculate them.
Final-day scenarios
With one or two matches left, the calculator tries every possible score and shows, for each result (2-0 or 2-1 either way), who is certain to go through, who is out, and when the games decide it. In the 2025 Connors Group, before the last match, the ATP wrote that if Alcaraz beat Musetti, de Minaur would qualify second; that's exactly what the table shows.
In 2023 it went the other way: Alcaraz, Medvedev and Zverev all finished 2-1, and Zverev went out despite winning the most games (40-35), because his sets record was the weakest (4-3, against 5-2 and 4-2).
Frequently asked questions
How do players qualify from the ATP Finals groups?
The top two in each group of four go through. Wins count first; two players level are split by head-to-head, three by the percentage of sets won, then games won, then ATP ranking.
What happens in a three-way tie?
The percentage of sets won across all group matches is compared. If that separates only the best or only the worst player, the other two are split by head-to-head. If sets don’t separate anyone, the percentage of games won and then the ATP ranking decide.
When are the 2026 ATP Finals?
From 15 to 22 November 2026, at the Inalpi Arena in Turin.
How are the semi-finals drawn?
Each group winner plays the runner-up of the other group. There is no third-place match.