I formation

== English == === Etymology === From the vertical (as viewed from the opposing endzone) alignment of quarterback, fullback, and running back, particularly when contrasted with the same players' alignments in the T formation. === Noun === I formation (plural I formations) (American football) A common offensive formation, beginning with the usual five offensive linemen (two offensive tackles, two guards, and a center), the quarterback under center, and two backs in-line behind the quarterback. The base variant adds a tight end to one side of the line and two wide receivers, one at each end of the line. (tennis) A formation in doubles where the server's partner starts crouched down close to the center of the net ==== Coordinate terms ==== T formation