Continuity mistake: Ishizaki misses his tackle on Misugi and knocks down the supporters instead. You can see that they fall into the playing field, inside the lines. Sanae sits on him. Though and the lines are gone. The pants of the rightmost bystander go from brown to blue, also. (00:17:55)
Other mistake: Jun's parents can't see the kids by the goal, only their shadows, but they are positively unfazed when Tsubasa is celebrated loudly and dangerously acting as substitute for him (which is the reason why Tsubasa is replacing Jun in the celebration to begin with).
Continuity mistake: Misugi's face during his careless last stride has a muddy look. One could think that he's turning blue because his heart is malfunctioning, and he's lacking oxygen. When Takasugi gives chase, he has a muddy face too in a shot as well. They are both clean later.
Other mistake: In the previous episode it was established that the final takes place the day after the semifinals. The kids went right away to the hospital and talked about the match against Musashi, wearing normal clothes, and had a night adventure searching the town left and right. In this episode another day passes by before the final.