On November 16, 2013, a 40-year-old David Tua (52-4-2, 43 KOs) and Alexander Ustinov met in the ring in a heavyweight bout.
Tua came in to the fight on a 1-fight losing streak with a 74% KO rate, and was fighting after a gap of 2 years, 3 months, and 3 days.
David Tua lost to Alexander Ustinov via unanimous decision in the 12-round heavyweight fight, and adds an loss to his record at 52-5-2.
On August 13, 2011, a 38-year-old David Tua (52-3-2, 43 KOs) and a 40-year-old American boxer Monte Barrett (34-9-2, 20 KOs) met in the ring for the 2nd time, in a heavyweight bout.
Tua came in to the fight on a 1-fight win streak with a 75% KO rate, and was fighting after a gap of 4 months and 25 days. Barrett was on a 0-fight win streak with a 44% KO rate, and fighting after a layoff of 6 months and 22 days.
In the rematch, Monte Barrett defeated David Tua via unanimous decision in the 12-round heavyweight fight. Barrett improves his record to 35-9-2, while Tua adds a loss to his record at 52-4-2.
On August 18, 2001, a 28-year-old David Tua (38-2, 33 KOs) and a 31-year-old American boxer Chris Byrd (33-2, 19 KOs) met in the ring in a heavyweight bout.
Tua came in to the fight on a 1-fight win streak with a 82% KO rate, and was fighting after a gap of 4 months and 26 days. Byrd was on a 2-fight win streak with a 54% KO rate, and fighting after a layoff of 3 months and 6 days.
Chris Byrd defeated David Tua via unanimous decision in the 12-round heavyweight fight. Byrd improves his record to 34-2, while Tua adds a loss to his record at 38-3.
On November 11, 2000, a 27-year-old David Tua (37-1, 32 KOs) got a shot at the heavyweight WBC and IBF title held by 35-year-old British boxer Lennox Lewis (37-1-1, 29 KOs).
Tua came in to the fight on a 10-fight win streak with a 84% KO rate, and was fighting after a gap of 3 months and 21 days. Lewis was on a 3-fight win streak with a 74% KO rate, and fighting after a layoff of 3 months and 27 days.
Lennox Lewis defeated David Tua via unanimous decision and successfully defended his WBC and IBF heavyweight titles. Lewis improves his record to 38-1-1, while Tua adds a loss to his record at 37-2.
On June 7, 1997, a 24-year-old David Tua (27-0, 23 KOs) and a 24-year-old Nigerian boxer Ike Ibeabuchi (16-0, 12 KOs) met in the ring in a heavyweight bout.
Tua came in to the fight on a 27-fight win streak with a 85% KO rate, and was fighting after a gap of 2 months and 2 days. Ibeabuchi was on a 16-fight win streak with a 75% KO rate, and fighting after a layoff of 30 days.
Ike Ibeabuchi defeated David Tua via unanimous decision in the 12-round heavyweight fight. Ibeabuchi improves his record to 17-0, while Tua adds a loss to his record at 27-1.