American Jr. Team
Mr. Baker is the coach of the American Jr. Team. He's the kind of person who will stop at nothing just to get his ambition, very cutthroat indeed. He would step on people just to get where he wants to be, that's his personality. He's the one who "discovered" every player included in the American Jr. Team, his policy in playing tennis is to be actor-like and make the match some kind of a movie for sponsors to be interested in.
Kevin Smith is a very talented tennis player. His father is the one who Nanjiroh defeated in episode 129 (the coach who bullied Rinko). Kevin's father became a drunkard after Nanjiroh defeated him, therefore, Kevin's got such a huge grudge on Ryoma. His special moves are Ryoma's moves too, in fact Kevin became too obsessed with Ryoma that he copied his special moves like: Twist Serve and Drive B among others. He wasn't able to copy Ryoma's Cyclone Smash though. Anyway, Kevin's got his own original special moves, they are the: Phantom Ball and Illusion.
Billy Cassidy is a cowboy who ventured to the city and met Kevin. He's very friendly to everyone, maybe because he's a cowboy. He's also in love with a certain rich girl he saw (and met) through oe of his ventures in the city. Anyway, his special moves are the Shot Gun Volley (which defeated Atobe's Hametsue no Rondo) and Bull-Rope Serve.
Michael Lee is a very quiet person. Straight forward and no-nonsense attitude. This character of him was supposed to be due to the upbringing of his father who is very strict with him and instilled him the saying of "Survival of the Fittest". He's a former practitioner of Kung-Fu, therefore, could make really good feints (which fooled even Sanada) and could return a really fast ball.
Tom Griffy and Terry Griffy are brothers. Yup. They. Are. Brothers. The person who really looks like a girl is in fact a boy. Will wonders ever cease? Anyway, because of how they look and how "cool" "awesome", etc. they are, Tom and Terry got this huge fanbase wherever they go. They are former performers on the street. They use their unbelievable coordination in tennis in performing to be able to eat and live. After they're found by Baker, they never returned to being poor and hungry again.
Bobby Max. He's really a junior high school student, really! Well, it wouldn't be a surprise if you get one look at him and think that he's a wrestler! Anyway, Bobby Max has no usual tennis form. Being strong is already a given, but he's got brains too. In school, he plays tons of other sports like basketball and football, among others. There's only one problem, he gets angry easily thus, easily distracted.
Arnold Ignashov is originally from Europe. His parents had fled Europe after the Berlin wall fell, they went and lived in America. Arnold carries the name Tennis Machine due to his uncanny accurate shots, very accurate that it's usually called "on the line".