  Digital twins belong to ten of the strategic technology trends according to
the Gartner list from 2019, and have encountered a big expansion, especially
with the introduction of Industry 4.0. Sport, on the other hand, has become a
constant companion of the modern human suffering a lack of a healthy way of
life. The application of digital twins in sport has brought dramatic changes
not only in the domain of sport training, but also in managing athletes during
competitions, searching for strategical solutions before and tactical solutions
during the games by coaches. In this paper, the domain of digital twins in
sport is reviewed based on papers which have emerged in this area. At first,
the concept of a digital twin is discussed in general. Then, taxonomies of
digital twins are appointed. According to these taxonomies, the collection of
relevant papers is analyzed, and some real examples of digital twins are
exposed. The review finishes with a discussion about how the digital twins
affect changes in the modern sport disciplines, and what challenges and
opportunities await the digital twins in the future.
