What is the tennis score when a server has won four points and the receiver has won three points?

In tennis scoring, when a player reaches four points but has not yet won the game, the scoring terms "ad-in" and "ad-out" are used to indicate which player is in the advantageous position to win the game. The terms arise after both players reach 40 points, where one player gains a point to reach "advantage."

In this scenario, the server has won four points, while the receiver has won three points. Since the server has more points, they would have the advantage at this moment in the game, specifically referred to as "ad-in." This means that the server is in a position to win the game on the next point played, assuming no faults or errors occur.

The other possible scores do not correctly reflect the server's advantageous position. "Ad-out" is used when the receiver has the advantage after both players have reached 40 points. The scores "30-40" and "40-30" indicate specific point totals, not the advantage scenario. Therefore, the correct understanding of the score with the server having an advantage after winning four points makes "ad-in" the accurate answer.