Pocket depth variations in tennis rackets significantly influence how the ball bounces upon impact. A deeper pocket typically allows the ball to sink more into the strings, which can generate a softer, more controlled bounce, helping players to achieve better spin and placement. Conversely, a shallower pocket can result in a firmer, quicker bounce, which may suit aggressive play but can also lead to less control. Players often choose their pocket depth based on their playing style and the type of shots they wish to execute.