Former boxing champion Mike Tyson has fought back tears as he confessed to lying about his sobriety.

Joseph Parker's back - and he's looking bad. New Zealand's top heavyweight prospect arrived home on Thursday for a brief visit, after a gruelling seven-week training camp with Kevin Barry in Las Vegas.

Alexander Ustinov's camp will temporarily head back to Russia because of David Tua's calf injury, but fight promoters are confident the delay won't cost them too much.

David Tua's boxing bout against Belarusian heavyweight Alexander Ustinov has been postponed until Saturday November 16.

Victory over Russian Ustinov could set stage for another title fight as David Tua makes new bid for big time.

An inspired Kelly Lynch finds tension and excitement ringside in Bangkok.

Boxer David Tua had to answer honestly when a young student at Hamilton Boys' High asked him whether he'd ever been hit in the privates.

When it comes to boxing, few people are ever completely retired.

David Tua publicly said he was done with boxing last year, but it appears that there's still some life left in the 40-year-old's career.

Rising heavyweight boxing star Joseph Parker has called for supporters to be kept further away from sports fields and courts to limit the danger of violence and abuse.

David Tua's do-or-die comeback bout will be in Hamilton on August 31 against a giant Russian - one of the most highly rated heavyweight boxers in the world, a war hero and a huge man of 2.03m and about 136kg, Alexander Ustinov.

By far the biggest problem David Tua faces in his heavyweight fight against Russian Alexander Ustinov on August 31 is the size of his 2.03m, 136kg adversary.