On this, we would like to cite the statement of Sheikh Ahmad Kutty, an Islamic scholar, who said:

“First of all, players, even non-Muslims, do not do this out of worship for the statue, but out of extreme love for money and fame. Players want to be celebrities and they think by holding the world cup, for example, they become famous. So we should not exaggerate in describing the situation.

Shirk means to ascribe another god with Allah, taking it as rival to Allah, which is not the case with the example you mentioned. Of course, this act is highly condemned as it contradicts the concept of modesty and humbleness, as well as it lacks the most important thing which should take place after getting a prize, which is to thank Allah Almighty for the blessing.