Joey Barton has denied all wrongdoing after an alleged incident involving Barnsley boss Daniel Stendel following Saturday's League One match against his Fleetwood Town side.
Barnsley confirmed the club made a formal complaint to the English Football League and Football Association this week, while South Yorkshire Police are also investigating the matter.
A police statement said on Wednesday a man was arrested "on suspicion of racially aggravated public order offence and racially aggravated assault" in connection with the incident but has been bailed until next month.
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The full statement read: "A man arrested on suspicion of racially aggravated public order offence and racially aggravated assault, in connection to an incident at Barnsley Football Club on Saturday 13 April, has been bailed until next month.