Other mistake: When Sanae tells to the team "Ishizaki is right!" and gives them a pep talk, she's practically a hobbit next to the others, and a couple players are on odd mounds as if it were a baseball field. On a soccer pitch you just can't have that sort of uneven ground. (00:19:00)
Other mistake: When Miss Ozora tells Roberto that he should have shown her The Letter from the beginning, Tsubasa is drawn looking in the wrong direction. (00:17:25)
Continuity mistake: When Ryo tells Roberto that a drunkard like him is unfit to be the coach, next to him there's someone with an orange jersey, but there's nobody wearing that color in the wider shots. (00:21:10)
Continuity mistake: Throughout the episode, the ranks of the team Tsubasa battles against keep changing and going back and forth between 10 to about 13 people.
Continuity mistake: When the two aces compete for Roberto's centering kick, Tsubasa is on the outside, in front of Genzo, going parallel to him yet as they land he's on the opposite side. (00:09:00)
Other mistake: Tsubasa is talking to 'his friend' the football as he does keepie-uppies. He is normally animated pretty decently during that activity, except in the shot when he is telling his friend about Genzo's skills; he is keeping his torso completely immobile, moving just his thighs, which is just physically impossible. A few shots later his torso is still again but at least his thighs are not in frame (the ball is though, what could he possibly be using to juggle it up?). (00:06:10)
Other mistake: Needless to say, having a football on your belly can't cushion the impact with a truck. Even forgiving this obviously cartoonish impossibility, still the way Tsubasa lands looks all kinds of wrong, with the forward momentum instantly halted as the ball touches the ground again. (00:14:25)
Continuity mistake: In the flashback, Tsubasa's father all of a sudden between cuts has his hand on top of the head before realizing that the kid is missing. (00:10:15)
Continuity mistake: Tsubasa dribbles 9 to 11 players in his first sprint, never stops advancing when tackled (he jumps over the offenders), dribbles 5 more, but in front of the penalty area there are at least 8 new guys ready for him. (00:07:05)
Continuity mistake: Tsubasa is athletic and quick and goes straight towards the goal starting from the kick-off spot at midfield, but a couple of opponents he dribbled try to tackle him again, and are incoherently shown as tackling from the front even if they came from behind. (00:07:00)
Continuity mistake: In his first dribble, Tsubasa goes past 3 opponents, but there's just one behind him in the next shot. (00:06:50)
Factual error: Genzo challenges Tsubasa to a rematch, this time in a regular "90 minutes match." They are elementary school students, their matches last only about 40 minutes.
Continuity mistake: Once Genzo is beaten, the ball is inside the goal towards the right. He walks away, nobody having touched anything, and the ball is towards the left. (00:11:00)
Continuity mistake: An indignant Genzo pushes Tsubasa away from him as he tries to aid him. Tsubasa lands with his back into the goal net, but Genzo pushed him away from the goal. (00:09:30)
Continuity mistake: When Tsubasa hits his header, he is far from the box; Genzo punches away with 4 of his teammates in front of him, but then in the aerial shot there are 13 (!) teammates on the field, about 6 close by, plus... Tsubasa himself. (00:07:55)
