Defensive tennis shots, such as LOBS, are shots that are used to gain an advantage over the opponent. A lob is a shot that is hit high and deep into the court, making it difficult for the opponent to reach. It is usually used when the opponent is close to the net, as it gives the player time to get back to the baseline. The lob can also be used to force the opponent to move around the court, allowing the player to gain an advantage.