Birmingham have backed Jermaine Pennant after he was allegedly involved in an incident while on holiday.
The former Arsenal midfielder, 22, was reported to have been punched by a man after a dispute outside a restaurant on the Greek island of Zante.
"We've been made aware of this incident and the details are still sketchy but we believe in Jermaine," said Blues chairman David Gold.
"Until we know more and I've spoken to Jermaine, I can't comment further."
Pennant said he was harassed and was reported to have called his attacker a "muppet" before being knocked to the ground.
"A group of lads taunted me about spending time in prison earlier this year and having to wear a tag when I was released," he told the Daily Mirror newspaper.
"All that happened was I told them to get lost - and that was it. They tried to ruin my holiday but I was not going to rise to it and I just ignored them."
Sky Andrew, agent for the England Under-21 star, defended his client.
"Unfortunately, this happens all the time," he said.
"Lads try to make a name for themselves by targeting Jermaine. They see him as an easy target because of his past."
Pennant served four weeks of a three-month jail sentence during March for driving offences when he was still an Arsenal player.