Character mistake: Roberto says that Misugi already "peaked as a player" as opposed to Tsubasa who can improve. Since he does not know of Misugi's heart condition, the notion that a football player reached already his full potential when he is barely 11 years old is nonsense.
Character mistake: The characters keep referring to this match as Jun Misugi's last, hoping he'll win it, but Meiwa is an opponent just as fierce as Nankatsu, so even if Misugi beat Tsubasa, he would need to play still one more match. It's Misugi's last only if he loses (as in fact happens, but they can't know that).
Character mistake: Tsubasa loses the ball botching the control with his chest, and the announcer says that Nankatsu is in danger, caught by surprise and need to pull back. As he says that, the images show 5 defenders perfectly placed in the penalty area and the team not off balance at all. (00:14:00)
Character mistake: The Tachibana twins' play leading to the second goal is called by the commentator as "on the limit of the offside", but that does not make sense; there are a bunch of players in front of them, it does not come close to being offside. (00:06:50)
Character mistake: Rare instance in this anime, a foul is given when four players from Meiwa tackle Tsubasa at once and hook his foot when he successfully evaded them. In truth though, any referee should have blown the whistle already way before, since the four ganged on Tsubasa throwing themselves at him multiple times before that one, each time sticking their leg out without even aiming at the ball - Tsubasa has to literally duck to avoid one of those tackles.
Character mistake: Ishizaki bashes (quite literally, hitting him in the head with an angry punch) Morisaki because he did not catch Tsubasa's shot, saying it was easy. Someone drew the shot the wrong way or Ishizaki is a complete idiot - and all his teammates that do not say anything too. Tsubasa's shot was almost impossible to catch.
Character mistake: Ishizaki fails to recognize that the 'giant' he met is a goalkeeper. He was wearing long sleeves, goalkeeper gloves and when he walked away Bruce kept staring at him...and the enormous number 1 on his back. It takes a very special kind of football player to not identify someone like that as a goalkeeper.
Character mistake: Matsuyama meets Misaki and asks him with surprise if he's part of the tournament too. But in the previous episode, Matsuyama was aware of that already and mentioned to the rest of the team that since they qualified, they would face him. (00:07:50)
Character mistake: According to the tactical reading of Tsubasa's dad, Tsubasa's flaw is that he's not used to team play since he's just been playing with the ball on his own from a tender age. Just seconds before, Genzo made the comment that Tsubasa is a clever player that can read the passes of his opponents instantly. So he's both clueless about team play and an expert on it in the space of 30 seconds.
Character mistake: For being such a football fan, Tsubasa surely keeps poor care of his gear, since he goes everywhere wearing football boots, and the studs are certainly not suited for 24/7 usage on asphalt. Even worse for Genzo, who for no reason walks around the city in his full goalkeeper uniform and boots. He's a professional with a private coach who is very strict. Besides...who would keep goalkeeper gloves off the pitch all the time?