Golden Pair's Memories
Kaido loses his memory trying to save Ryoma from a certain head and face injury. Ryoma and Momoshiro try to get his memory back by playing a match against Kaido and Yuuta that sparks a really good side of him, and he gains back his memory in the end!
Aired 01/12/2004EP 162 - Golden Pair's Memories

2001
The Prince of Tennis
Echizen Ryoma is a young tennis prodigy who has won 4 consecutive tennis championships but who constantly lies in the shadow of his father, a former pro tennis player. He joins the Seishun Gakuen junior highschool, one of the best tennis schools in Japan, and there along with his teamates he learns to find his own type of tennis in an attempt to defeat his biggest obstacle of all: his father as well as himself.
(Source: Anime News Network)