Question

what happens in tennis when a server hits two faults in a row

Answer 1

In tennis, when a server hits two faults in a row, it results in a double fault. A double fault means that the server loses the point they were trying to serve. The receiving player is awarded the point, and the server must then start the next point by serving again. This can be particularly costly, especially in important situations, as it directly gives the opponent a point without any rally taking place.