Glossary of Tennis Terms - I

I

• I-formation: Formation used in doubles where the net player begins roughly at the center of the net; used mainly to counter teams that prefer a crosscourt return.
• inside-out: Running around the backhand side and hitting a crosscourt forehand. Vice-versa for inside out backhand.
• inside-in: Running around the backhand side to hit a forehand down the line. Vice-vesa for inside in backhand.
• insurance break: Break that achieves an overall advantage of two breaks of serve.
• ITF: International Tennis Federation, the governing body of world tennis.