Soccer has many and various situations whether offensive or defensive, and almost all the games have some players substituted in different times during the match, the substitute has his predetermined duties according to the match's situation and result, or to maintain the result as possible. Most of the players do their role and become the key players in many hard offensive and defensive situations as they have enough experience and high technical level, taking into consideration that the substitute's negative performance would be reflected on the game's result.
The study is important because it aims at determining the role of the substitute in the different game situations in the African and European soccer championships, in order to take advantage of this analytical study in the training process.
By reviewing the previous literature and through the researcher's work in the field of soccer training, it was clear that there is a lack in the literature and research concerned with the role of the substitute, and by following the substitute in the African and European soccer championships, we would find that the substitute was the main reason that the Egyptian team won the 2010 Africa Cup of Nations and the Spanish team won the 2012 European Soccer Championship. It was obvious in the game of Egypt vs. Ghana in the 2010 Africa Cup of Nations when Nagy Gedo entered the game and scored the goal that won the championship, this also happened in the final of the 2012 European Soccer Championship between Spain and Italy when Spain won 4-0, with two substitutes, Fernando Torres and Juan Mata scoring two goals.