Also referred to as "the pillar pair" the Ryoma and Tezuka pairing is from The Prince of Tennis. Both players were "the pillar of Seigaku" which is where this pairing name comes from.
Ryoma joins the team as a first year while Tezuka is the captain. Seeing potential in Ryoma he later tells him he is the pillar of the team - Tezuka is one of the few players that Ryoma respects and wants to beats, in other words he sees Tezuka differently from most other players he encounters.