All Australian AFL defender Nathan Bock has been charged with assaulting his girlfriend at an Adelaide hotel.

The Adelaide club champion was also charged with causing property damage after being detained by police late Saturday night, his club said.

Bock, who played for the Crows in his side's loss to St Kilda in Adelaide on Friday night, faces sanctions from his club as a result of the incident.

It is believed Bock was evicted from the General Havelock Hotel in central Adelaide and later reported by police for allegedly assaulting his girlfriend.

South Australian Police would not comment on the charges on Sunday, but the Crows released a statement saying Bock would face court later this year.

"The Adelaide Football Club advises that Nathan Bock was last night reported by police for assault and causing damage," said the statement, attributed to football operations general manager John Reid.

"The report resulted from an incident late on Saturday evening at a city hotel.

"Nathan was detained by police and then released to appear in court later in the year.

"The club is gathering more information regarding the incident and once we have all the details the club will advise all concerned on what action it will take from a club and AFL perspective.

"We will endeavour to do that as soon as possible."

Bock can be fined a maximum of $5,000 under the AFL players' code of conduct, while any possible suspension would be a matter for the club.

Bock has played 88 AFL games since making his debut in 2004.

The 26-year-old last year was selected in the All Australian side last year and also won Adelaide's club champion award.

Bock will become the third Adelaide Crow currently playing to face court.

In June last year, midfielder Scott Thompson was given a four-month suspended jail sentence and had his driver's licence disqualified as a result of a car crash in which a friend was injured.

Thompson had pleaded guilty to charges of causing serious harm by dangerous driving and of leaving an accident scene after causing serious harm.

In 2005, defender Graham Johncock, who lied to police after crashing his car into two parked cars, was fined $1,000 and disqualified from driving for 21 days.

In 2007, Crows captain Simon Goodwin was fined $20,000 by the AFL after being caught gambling on AFL games, which is illegal for players under competition rules.

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