The player who wins a point at 40-40 or deuce has the upper hand. You can only win the game now if you have a lead and score another point. If you lose the advantage point, the score is reset to deuce!
When the score reaches 40-40, a player must win two points in a row in conventional advantage scoring. In tennis, a score of 40-40 is referred to as a deuce. If both players reach match point at the same time, then the last server gets one more chance to win the game.
There are several ways to win a game that is tied at 40-all. The first way is called "the first serve." This means that you will be given the first opportunity to win the game by serving first. If your opponent returns your first ball, then you will get another chance to win the game with your second service game. However, if they return it again, then the game goes to deuce once more. This process continues until one player wins three consecutive games to take a decisive lead in the match.
In this case, each player will receive five opportunities to win the game. They can do this by winning two sets of balls in a row. As long as they don't touch a ball during a pause in play, they can keep receiving serves. Once a player fails to win a set, the other player gains control over the breaker. They can also force a third set by winning four out of five balls in a row.
If they tie at 40, it's referred to as a deuce. Following a tie, the next individual to score a point has the edge, but must usually win by two points—that is, score twice in a row to win the game. It doesn't end there. The player who scored the deuce can then re-serve again if he or she chooses. If the second serve is returned, then a third serve is required to settle the game.
A match is considered finished when one player has won six games from any court in a single set. If both players have won five games, then a decider is required to determine the winner. This can only happen if all of the matches on the table are still active (i.e., not yet finished). A decider can also occur if both players have won four games but have not reached the set score of 10 points. In this case, the first server is chosen at random to begin the decider.
A match may also be decided by a tiebreaker. These are special sets of up to five games that can only happen if there is a deuce breaker. They can only happen during regulation play and are used to resolve ties between two players or teams who are all equal on zero wins each. They can only happen on courts where the men's and women's games are played separately.
When both players hit 40 points, this is referred to as a "deuce" (not a "40-all"). Following a deuce, a player must score two consecutive points to win the game. The "advantage" is the first point scored after the deuce. When a player gains an advantage, their following point is the winner.
When a game or set is tied, you use the phrase "all" when reporting the score. For example, if you and your opponent each scored two points, the final score would be 30-all. For example, if you and your opponent each scored two points, the final score would be 30-all.