Mike Tyson is on the verge of bankruptcy despite earning an estimated £70 million for his last six fights. The disgraced former world heavyweight champion owes the US Government around £4.4 million in unpaid income taxes and is said to be blaming his promoter Don King for his predicament.

One source close to Tyson, who is currently banned from boxing for biting Evander Holyfield's ears, told the New York Post: "He's down to about $150,000 (£93,000) in liquid assets."

The fighter's plight reached a new low with an alleged violent confrontation with King outside the Hotel Bel Air in Los Angeles on Saturday night.

Tyson reportedly slapped King, shoved him and was ushered into a waiting car. King, desperate to hold onto the last saleable commodity in his crumbling ring empire, followed Tyson to the car and opened the door, only to be greeted with several kicks to the face, the witnesses said.

Tyson will appear at a news conference in New York tomorrow to announce his appearance next month on a WWF `Wrestlemania' pay-per-view event. Tyson is also expected to confirm he has fired his co-managers, John Horne and Rory Holloway, as well as having terminated his association with King.

Lennox Lewis will head a trans-Atlantic, British v America World title bill on March 28th. The London-born WBC heavyweight champion defends his title against New Yorker Shannon Briggs in Atlantic City. Sheffield's Herol Graham is also on the Atlantic bill. The 38-year-old veteran makes his third World title challenge against the IBF Super middleweight champion Charles Brewer of Philadelphia.