Bernard Tomic.

Bernard Tomic. Photo: Pat Scala

The father of Australian tennis star Bernard Tomic appears to be in hot water again, with reports he assaulted a member of his son's support team during a practice session in Europe.

John Tomic, who is also his son's coach, is reported by European media to have spent at least one day in jail in Madrid for hitting the team member in the face.

There are several reports suggesting that the assaulted man was Thomas Drouet, a 29-year-old Frenchman registered with the ATP World Tour as an inactive player.

John Tomic pictured in 2010.

John Tomic pictured in 2010. Photo: Paul Rovere

The co-owner of the TennisReporters.net blog, Matt Cronin, tweeted that Tomic senior was arrested for head butting and breaking the nose of Drouet, believed to be working as Tomic's hitting partner.

Cronin later told Fox Sports that he understood Drouet stepped in when Tomic tried to assault his son.

"He broke his nose with a head-butt and knocked him out cold for 20 minutes," Cronin said.

"John will appear in court in Madrid to answer to the charges."

Reports from French newspaper L'Equipe staff suggest that Tomic senior will face court in coming days.

Todd Woodbridge, the head of men’s tennis for Tennis Australia, said they were still trying to confirm the details.

"We’re still trying to ascertain if or what charges have been laid," Woodbridge told 3AW radio.

Woodbridge said reports that Bernard faced a potential 12-month suspension were incorrect.

"It’s totally incorrect because this would have nothing to do with Bernard’s behaviour.

"What’s important for us at Tennis Australia is that this allegation is thrown toward John, his dad, and not to Bernard."

Fairfax Media has contacted the ATP World Tour for comment.

Tomic is in Madrid this week for the Mutua Madrid Open tournament. He lost his first-round match against Czech Radek Stepanek in straight sets.

Tennis Australia released the following statement mid-morning on Monday:

"Obviously media reports regarding an incident in Madrid are very concerning.
 
"We are working closely with ATP officials who are investigating the incident and are unable to comment further until the full facts are known."

 - with AAP