For that reason, in this book the concept of SSCG can be associated with regular smaller versions or with more complex and adjusted versions of the game.

The main focus of our book is the application of SSCGs on soccer training. Nevertheless, these conditioned games are often used in other team sports.

In fact, the pertinence of these games for coaches has been researched (Clemente et al. 2015; Leite et al. 2009; Serrano et al. 2013; Siokos 2011).

In the case of basketball it was asked to 185 coaches which kind of tasks (SSCGs, offensive superiority games, defensive superiority games, formal game, offense and defense) must be recommended for specific stage of expertise (initiation, orientation, specialization, and high performance) (Leite et al. 2009).

The results revealed that SSCGs, formal game, and offense are important tasks to use in any stage of expertise, thus suggesting the great pertinence of the conditioned games for the training.

In other hand, in futsal (indoor soccer) a similar study revealed that coaches frequently used more SSCGs in the context of elite players, progressively increasing from the novice stages (Serrano et al. 2013).

Nevertheless, the use of SSCGs depends from the coaches’ level and from their background.

The adjusted versions of the game require that coaches really know the game and the didactics to modify a particular variable that augment the perception of players for the specific tactical topic.

A study conducted in Australia disclosures that coaches are not sufficiently qualified to coach by using SSCGs (Siokos 2011).

In this study it was revealed that coaches that worked in under-6 and under-8 opted for too much free-play style, without a technical or tactical orientation/topic.

For that reason, it was suggested that coaches need to have a conceptual understanding of how to best utilize SSCGs in a supportive and inclusive coaching environment (Siokos 2011).

Nevertheless, in expert coaches it was verified their better capabilities to correctly apply SSCGs in the context of soccer training (Clemente et al. 2015).

In a study that was asked to an expert coach to develop SSCGs to match with specific heart rate intensities, it was possible to verify that the application of the designed tasks resulted in moderate-to-strength correlations with the heart rate responses expected by the coach (Clemente et al. 2015).

Some elite coaches have also been emphasizing the importance of using drill-based tasks that emulate the dynamic of the game.

One of the main coaches that advocate for the use of SSCGs as the main tasks to develop his teams is José Mourinho.

During a long interview about their training methodologies, Rui Faria (member of the Mourinho’s staff) said (Oliveira et al. 2006): The ultimate goal is to play.

For that reason, sports training only can mean one thing: doing at playing.

If the goal is to improve the quality of the game and the organization, these parameters only can be achieved by using training situations where such organization can be developed.

Following the concept of an integrative approach that can be reached by using SSCGs, Mourinho also said (Figueroa and Mourão 2009): The beauty of this type of training [drill-based tasks] it is the possibility to develop at the same time many things.

It is hard to define the goal of this task [a specific SSCGs that Mourinho applied] because he is very rich.

SSCGs are adjusted versions of the game that improve the possibility to learn or to develop a tactical topic and at the same time may also provide the opportunity to develop the fitness (Halouani et al. 2014).

Their opportunities are evident in elite training and also in recreational mode and for that reason it is important to highlight the main benefits of these games for the soccer training (Krustrup et al. 2010).

The justifications to adhere by these tasks can be briefly identified in the following section.