It was reported that the Premiership striker's wife, Valerie, called the police after it was said she suffered a cut lip. A Greater Manchester police spokesman said: "Police were called to an address in Bolton at 6.45am on November 5 following reports of an assault. Officers arrested a 25-year-old man on suspicion of committing assault. He has since been bailed pending further inquiries to appear at a police station tomorrow
Diouf played in Bolton's 1-0 Premiership defeat by Wigan at the Reebok Stadium on Saturday. The former African footballer of the year has been a controversial figure since joining Liverpool from French club Lens in a £10m deal in 2002.
He has twice appeared in court following incidents of spitting. In September 2003 he was fined £5,000 at Glasgow's Sheriff Court for spitting on a Celtic supporter during a Uefa Cup quarter-final with Liverpool. Last November, he pleaded guilty to reckless behaviour at Teesside magistrates court when an 11-year-old fan claimed he had been hit by juice the player had spat from his mouth in a match at Middlesbrough's ground.
Diouf, who reportedly earns £40,000 a week, claimed legal aid to fight the case and was fined £500 and ordered to pay £500 costs.