Pong-like Games and Sequels (1973)

Soccer (1973) - Taito

Hocky (1973) - Ramtek

Davis Cup (1973) - Taito

Paddle-Ball (1973) - WMS Industries

Tennis (1973) - Volly

Pong-Tron (1973) - Sega

Puppy Pong and Dr. Pong (1973) - Atari 

Pong Doubles (1973) - Atari 

 Sources:

"Atari Pong Doubles (1973) Gameplay Video" Youtube, uploaded by andys-arcade, Dec 17, 2014. https://www.youtube.com/watch?v=09qHnr1DMwA

"Davis Cup" The Arcade Flyer Archives, https://flyers.arcade-museum.com/?page=thumbs&db=videodb&id=283

"Hockey" The Arcade Flyer Archives, https://flyers.arcade-museum.com/?page=flyer&db=videodb&id=2608&image=1

"Paddle-Ball" The International Arcade Museum, https://www.arcade-museum.com/game_detail.php?game_id=8965

"Puppy Pong / Dr. Pong" The Archade Flyer Archives, https://flyers.arcade-museum.com/?page=thumbs&db=videodb&id=1986

"Soccer" Giant Bomb, https://www.giantbomb.com/soccer/3030-28798/

"Volly Industries Arcade Games" Volly Industries Ltd. http://www.ccjvq.com/slydc/topic/volly/volly.htm