Alan Miller was an early game designer for Atari and their 2600 (then called the VCS) console. One of his games for that platform was Basketball in 1978, featuring a trapezoid court that startled a lot of people with its illusion of depth. Miller pushed the then-known programming limits of the 2600, and subsequently went on to become one of the founding members of Activision, the first third-party publisher of 2600 games.
While at Activision, Miller would take the trapezoid court of Basketball and rotate it vertically for this game, 1981′s Tennis. When it came to making great sports games as real as they could be on Atari’s flagship video game console, Alan Miller had no reservations.