Double elimination vs round robin
One gives everybody a second chance in a knockout; the other gives everybody a schedule. They answer different questions, and at four teams they cost exactly the same.
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What each format actually proves
Double elimination is a knockout with a safety net: lose once and you drop into the losers bracket, lose twice and you are out. It answers "who survives the day" more fairly than single elimination, without needing a full league.
A round robin answers a different question: "how do these teams rank against each other". Everybody plays everybody, so a lucky draw cannot carry anyone.
The numbers, from 4 to 16 teams
Four teams: 6 matches either way. Double elimination is 2N − 2, a round robin is N(N − 1) ÷ 2 — at four teams both come to 6, which is the only size where they are identical.
Eight teams: 14 matches for double elimination against 28 for a single round robin. Sixteen teams: 30 against 120.
The difference is in the shape, not just the count: a round robin’s rounds run in parallel (all matches in a round can be played at once), while double elimination has dependencies — the losers bracket waits for the winners bracket to report.
Where the two overlap
Both formats work for 4, 8 and 16 teams (double elimination needs a power of two between 4 and 32; round robin stops at 16), so the overlap is exactly the range where most club and school events sit.
Choose double elimination when court time is short and the field is strong but unranked; choose a round robin when the ranking itself is the deliverable — a league, a promotion decider, or a title that must not depend on one afternoon.
Frequently asked questions
- Which is better for 4 teams?
- Both are 6 matches. The round robin runs in 3 parallel rounds, so it schedules better on two courts; double elimination has a losers bracket that must wait for the winners bracket.
- How many matches for 8 and 16 teams?
- Eight teams: 14 for double elimination, 28 for a single round robin. Sixteen teams: 30 versus 120.
- Can I use both formats for large fields?
- Double elimination covers up to 32 teams (power-of-two counts) and round robin up to 16. Beyond that, single elimination or groups plus knockout is the practical choice.