The I-formation is a strategy used in doubles tennis when a team is serving.
The server’s partner crouches at the center of the service line. This creates uncertainty for the returning team about where the net player will move.
The I-formation helps counter strong crosscourt returns from opponents. It allows the serving team to surprise and confuse the returners.
The I-formation requires good communication between partners. It can be an effective way to win points and disrupt the returner’s rhythm.
Teams may use hand signals to decide which direction each player will move after the serve.