Um guia para quem estuda Inglês Online
Well [read note 1] I would like to start off by defining what EUFA is for the forum members who are not familiar with football when it comes to competitions and stuff [grammatically correct, but unnecessary at a textual level]. The [new sentence] one I have chosen to [style and register] talk about in this piece of text is the UEFA, which stands for "The Union of European Football Associations" but is most often referred to by its acronym. It's [new sentence] basically a competition which takes place every year on September 10 or so, which involves 72 teams throughout the Europe [continent names do not take the article] and in which [style and cohesion] the two highest-ranking [alternative wording] teams on the table of each European league around the Europe can participate of the competition [passage made unnecessary by previously inserted "in which"]. It is composed of 7 groups, with 4 four teams each, and all 52 teams are split into these 7 groups composed of 4 teams each one [read note 2]. Now that you know how the competition works, I can proceed / go on and tell you guys about an incredible match which took place last year, if I am not mistaken, between Chelsea x Barcelona. [Periods won't kill you.] Here is how it went [fluidity and style]: Barcelona had the most possession throughout the first half [alternative, more concise wording], but [introduction of constrasting idea] the second half was the other way around. Being the home team, Barcelona was the favorite to win the game, of course. The match [repetition of the word "game"] started to get boring, though, because Chelsea was playing very defensively, and they didn't seem to want to do anything other than park the bus in front of goal and prevent Barça from scoring. All of a sudden, however, one of Barça's players, to my surprise, made a schoolboy error, and that error was vital. Chelsea's player didn't miss the chance and scored an amazing goal, known as lob, from outside the box, and that goal was to put an end to the game. It was too late for Barcelona to score an equalizing goal, since the game was coming to an end.
It is composed of 7 groups, with 4 four teams each, and all 52 teams are split into these 7 groups composed of 4 teams each.