Tennis Score Calculator
Six games does not win a set at 6-5.
Work out Tennis Score. Six games does not win a set at 6-5. Shows the working, not just the answer.
Current set
5-4
1-0 in sets, first to 2
The two-game margin is what makes tennis scoring distinctive. Six games does not win a set at 6-5 — you need to be two clear, which is why sets have a minimum length and, before tiebreaks existed, no maximum at all. The tiebreak at 6-6 was introduced in 1970 precisely to bound that. Before it, sets could run indefinitely; the longest professional match on record went to 70-68 in a final set played without one. Games are scored 15, 30, 40, game, with deuce and advantage at 40-40 applying the same two-point margin one level down. The origin of the 15-30-40 sequence is genuinely uncertain, with the clock-face explanation being the most repeated and least evidenced.
How the Tennis Score Calculator works
Where a tennis match stands — games needed to take the set, whether a tiebreak applies, and how close the match is to finishing. With a rough win probability from a service hold rate.
Also known as: does 6-5 win a tennis set · when is a tiebreak played · tennis scoring explained · how many sets to win a match
Frequently asked questions
Why do you need to win by two games?
The two-game margin is built into the format so a set cannot be taken on a single break of serve at the wire. It gives sets a minimum length and, before tiebreaks, no maximum at all.
When does a tiebreak happen?
At six games all, in almost all formats. It was introduced in 1970 specifically to bound sets that could otherwise run indefinitely.
What is the longest tennis match?
Isner against Mahut at Wimbledon in 2010, whose final set finished 70-68 because no tiebreak applied there at the time. It ran over 11 hours across three days.
Why is it 15, 30, 40?
Genuinely uncertain. The clock-face explanation — quarter, half, three-quarters shortened from 45 — is the most repeated and the least evidenced.
What is deuce?
40-40, where the same two-point margin applies one level down: a player must win two consecutive points, taking advantage first and then the game.
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