How many matches in a 5 team round robin?

Ten. Each of the five teams plays the other four once, which is five times four divided by two.

How many rounds does a 5 team round robin take?

Five, with two matches in each and one team resting. An odd field always needs as many rounds as there are teams.

Why does one team sit out each round?

Because five cannot be split into pairs. Four teams play two matches and the fifth rests, and the rest rotates so everybody sits out exactly once.

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5 Team Round Robin Schedule

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Five teams play ten matches, everybody meets everybody once, and because the field is odd one team sits out every round. That gives five rounds of two matches rather than four rounds of two and a half, which is the arithmetic reason an odd round robin needs one more round than you might expect.

It is the format to reach for when five teams would otherwise face a bracket with three byes. Everybody plays four matches, the table settles it, and nothing depends on who happened to be seeded into the empty half of a draw.

How the draw is structured

Entrants

Matches played

Rounds

Per entrant

Round by round

Round	Matches	Entrants left after it
Round 1	2	all still playing
Round 2	2	all still playing
Round 3	2	all still playing
Round 4	2	all still playing
Round 5	2	all still playing

One entrant rests each round

With an odd number of entrants there is no way to pair everybody at once, so each round one sits out. That is why 5 entrants need 5 rounds rather than 4, and everybody still plays everybody exactly once.

How long it takes

Rounds run one after another, because a round cannot start until the one feeding it has finished. Matches inside a round can all run at once, so the number of courts you have decides the day more than the number of entrants does.

Courts	10 min matches	20 min matches	30 min matches
1	1h 40m	3h 20m	5h
2	50m	1h 40m	2h 30m
4	50m	1h 40m	2h 30m

Playing time only. Add changeovers, warm-ups and the gap between rounds.

Questions

How many matches in a 5 team round robin?: Ten. Each of the five teams plays the other four once, which is five times four divided by two.
How many rounds does a 5 team round robin take?: Five, with two matches in each and one team resting. An odd field always needs as many rounds as there are teams.
Why does one team sit out each round?: Because five cannot be split into pairs. Four teams play two matches and the fifth rests, and the rest rotates so everybody sits out exactly once.