A round robin is one of the fairest ways to run a small tennis event. Every player or team plays every other player in the group, so nobody goes home after one bad match. The problem is the table. After a few rounds, nobody can remember who is first, who is second, and what still has to happen for the places to change. This calculator sorts the group for you, using the same order most tennis events use: matches won first, then sets, then games.
Round robin groups are used in club ladders, school competitions, junior events, and big professional events like the season-ending finals. They work well when you have between three and eight players and enough court time for everyone to meet. Each match counts toward the group table, and the top one or two players move on to a final or a knockout round. When the group is tight, the tiebreak rules decide everything, so it helps to agree them before the first ball is hit.
To use the calculator, enter each player or team on a row. For every player, fill in matches won and matches lost, sets won and sets lost, and games won and games lost. You can copy these numbers straight from your score sheets. If you only have match results so far, enter the sets and games as zero and the table will still sort by matches won. As more matches are played, update the numbers and run the calculator again.
The calculator ranks players in three steps. First, it sorts by matches won, because winning matches is what matters most. If two players have the same number of match wins, it looks at the set winning percentage, which is sets won divided by all sets played. If that is also equal, it looks at the game winning percentage in the same way. Only if all three are equal does it fall back to alphabetical order, and in a real event you would then use the head-to-head result or a playoff match.
Here is a worked example. Four players have played three matches each. Ana has won three matches, so she leads no matter what her sets say. Ben and Carla have both won two matches. Ben has won five sets and lost two, while Carla has won four sets and lost three. Ben ranks second because his set percentage is higher. Dan has won one match and sits last. If Ben and Carla had tied on sets as well, the calculator would compare their game percentages next.
Set percentage is a better tiebreak than counting sets won alone. A player who wins five sets and loses two has played seven sets, while a player who wins four and loses one has played only five. Comparing raw set totals would be unfair when players have played different numbers of sets, which happens when some matches finish early or a player retires. Percentages put everyone on the same scale, and the same logic applies to games.
Game percentage is the last safety net, and it rewards players who win their sets clearly. Winning 6-1 counts more than winning 7-6, even though both add one set to your total. That is why coaches tell players to keep fighting in a set they are losing, because every game can matter at the end of the group. A single game can be the difference between first and second place when two players are tied on matches and sets.
One common mistake is entering match scores instead of totals. The calculator needs totals across the whole group: all matches won, all sets won, and all games won added together. Another mistake is forgetting retired matches. If a player retires, agree in advance how the remaining sets and games are recorded, and write that rule down. Changing the rule halfway through a group always causes arguments, so settle it before play starts.
For organizers, the best habit is to update the table after every round and share it with all players. People accept a result much more easily when they can see the table moving round by round. Print the table or post it in your group chat, and keep the score sheets until the event is finished. If a result is disputed later, the score sheet is the only record that settles it.
This tool is free and runs entirely in your browser. Nothing is uploaded, no account is needed, and you can use it on a phone at the side of the court. It works for singles and doubles, for juniors and adults, and for any group size up to the rows shown. If your group is larger, split it into two groups and run the calculator once for each group, then bring the winners together for a final.
Before your event, check three things. First, confirm how many players advance from each group. Second, confirm the tiebreak order and write it on the draw sheet. Third, decide what happens if a player withdraws, because their results may need to be removed from the table. Answering these questions early keeps the event friendly, and the calculator takes care of the arithmetic from there.