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The overall results in the reference period 2003 – 2017 haveshown that most of the players were born in Q1 (n=551) and Q2(n=442). Therefore, 2/3 of the players (66%) were born in thefirst half of the year, while only 1/3 (34%) were born in thesecond half. A longitudinal study of tennis players aged 10 –12 showed the influence of RAE both in specific years (with theexception of 2011 and 2014) and in the reference period 2003 –2017 taken as a whole. The results of our research correspondto the results of similar studies performed by other authors.Tennis coaches are advised to address the issue of RAE whenworking with tennis youth and when selecting players to thesports centres, representations, etc.

Longitudinal Study of the Influence of the Relative Age Effect (RAE) on Czech Tennis Players Aged 10 - 12.