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In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

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How does the increase in foreign players affect football?

Ozan Sever¹, Erdem Ciğerci², Melih Öztop³

¹Sports Science Faculty, Atatürk University, Erzurum, Turkey.

BMC Sports Science, Medicine & Rehabilitation

|March 16, 2023

Summary

The number of foreign players in the Turkish Super League significantly increased between 2014-2020, correlating with more passes and possession in opponent fields, but fewer fouls. This suggests improved game quality and tactical evolution.

Keywords:

Football analytics Football performance Football statistics Foreign players Turkish Super League

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Area of Science:

Sports Science
Football Analytics
Statistical Analysis

Background:

Analyzed the impact of foreign players on Turkish Super League matches over six seasons (2014-2020).
Utilized 1836 match data from www.mackolik.com to assess trends.
Focused on the correlation between the number of foreign players and various match statistics.

Purpose of the Study:

To investigate the effects of increasing foreign player presence on Turkish Super League game dynamics.
To determine if foreign player numbers influence specific on-field performance metrics.
To understand the evolving tactical landscape of the league.

Main Methods:

Applied Pearson's correlation coefficient to analyze 18 variables against the number of foreign players (NoFP).
Variables included goals, shots, passes, possession, fouls, and team superiority metrics.
Examined data from 1836 matches across six seasons.

Main Results:

The number of foreign players (NoFP) per match rose from 10.43 to 17.99 between 2014 and 2020.
NoFP positively correlated with increased passes, accurate passes in opponent fields, and ball possession difference.
Fouls committed decreased significantly as NoFP increased (r = -0.250).

Conclusions:

Increased foreign player numbers appear to enhance game quality through improved passing and attacking play in opponent territory.
The data suggests a shift towards possession-based, half-field tactical competition.
Further research into game speed, intensity, and player exertion is recommended.