Few boxers have dominated a division the way Kostya Tszyu did, from his debut in 1992 to his final fight in 2005, building a legacy that still echoes in the sport. But his story isn’t just about titles—it’s about the two defeats that defined him, and the son who’s now carrying the torch.
Full name: Kostya Tszyu ·
Nickname: Thunder from Down Under ·
Record: 31 wins (25 KOs), 2 losses ·
Titles: Undisputed light welterweight champion ·
Born: 19 September 1969, Serov, Russia ·
Residence: Sydney, Australia
Quick snapshot
- Undisputed light welterweight champion (Wikipedia)
- 31 wins, 25 by knockout (International Boxing Hall of Fame)
- Inducted into Sport Australia Hall of Fame in 2011 (Sport Australia Hall of Fame)
- Exact net worth of Kostya Tszyu
- Current training or coaching activities
- Details of his divorce from Anastasia Tszyu
- 1992: Professional debut (Sport Australia Hall of Fame)
- 1995: Won IBF light welterweight title (Sport Australia Hall of Fame)
- 2001: Unified titles to become undisputed champion (Wikipedia)
- 2005: Lost to Ricky Hatton; announced retirement (Wikipedia)
- 2011: Inducted into Sport Australia Hall of Fame (Sport Australia Hall of Fame)
- Son Tim Tszyu continues the family legacy as an undefeated super welterweight contender (Wikipedia)
- Tim Tszyu is fighting for world titles (Wikipedia)
The following table captures the essential statistics of Tszyu’s career.
| Label | Value |
|---|---|
| Birth date | 19 September 1969 |
| Nationality | Russian‑Australian |
| Record | 31‑2 (25 KOs) |
| Championship | Undisputed light welterweight champion |
| Hall of Fame | Sport Australia Hall of Fame (2011) |
| Residence | Sydney, Australia |
Did Kostya Tszyu ever lose a fight?
Yes, Kostya Tszyu lost two fights in his professional career. His final record stands at 31 wins, 2 losses, and 1 no contest, with 25 wins by knockout (International Boxing Hall of Fame).
Who defeated Kostya Tszyu?
- Vince Phillips – defeated Tszyu by TKO in the 10th round on 31 May 1997, ending Tszyu’s first IBF title reign (International Boxing Hall of Fame).
- Ricky Hatton – defeated Tszyu by TKO (retirement) in the 11th round on 5 June 2005, winning the IBF and The Ring junior welterweight titles (Wikipedia).
The implication: these defeats do not erase his overall dominance but add a human dimension to an otherwise machine‑like record.
What did Ricky Hatton do to Kostya Tszyu?
Ricky Hatton, entering the fight unbeaten at 38‑0, upset the heavily favoured Tszyu on 5 June 2005 in Manchester, England (DAZN). Hatton’s relentless pressure and body work forced Tszyu to retire on his stool at the end of the 11th round.
How did the fight unfold?
Tszyu started well, but Hatton’s constant aggression and inside fighting wore him down. The fight was a major upset because Tszyu was regarded as one of the sport’s pound‑for‑pound elite.
What did Hatton say after the fight?
“Not only did he beat him, he broke him.”
Ricky Hatton, Sky Sports
Tszyu announced his retirement shortly after the fight, ending a 13‑year professional career.
Hatton’s victory is remembered as both a career peak for the Briton and the moment that revealed the limits of even the most disciplined fighters. For Tszyu, it was a exit that cemented his humanity.
The pattern: Tszyu’s only two losses came against relentless pressure fighters who exploited a gap in his defence that few others could find.
Where does Kostya Tszyu live now?
Kostya Tszyu lives in Sydney, Australia, where he moved after his amateur career. He is a Russian‑Australian citizen and has lived there for decades (Wikipedia).
Who is Kostya Tszyu’s family?
- First wife: Anastasia Tszyu (divorced; details private).
- Son: Tim Tszyu (professional boxer, super welterweight).
- Son: Nikita Tszyu (also a boxer).
Tszyu is of Russian and Greek ethnicity (Wikipedia).
What this means: the Tszyu boxing dynasty now rests on the shoulders of the next generation.
How good was Kostya Tszyu?
Kostya Tszyu is widely regarded as one of the greatest light welterweights of all time. He became the first undisputed junior welterweight champion in more than 30 years by unifying the WBA, WBC, and IBF titles between 2000 and 2001 (Wikipedia).
What titles did Kostya Tszyu win?
- IBF light welterweight title (1995)
- WBC light welterweight title (1998)
- WBA light welterweight title (2000)
- The Ring junior welterweight title (2000)
- Undisputed champion (2001)
He was inducted into the Sport Australia Hall of Fame in 2011 and the International Boxing Hall of Fame in 2011 (Sport Australia Hall of Fame; International Boxing Hall of Fame).
Tszyu’s dominance at 140 pounds set a benchmark that modern fighters like his son Tim are now measured against. His amateur pedigree—259 wins, 11 losses—was a foundation few could match.
The catch: his reign also highlights the fragility of even the most decorated careers when facing the right stylistic challenge.
Who is Kostya Tszyu’s son?
Tim Tszyu is Kostya’s eldest son and a professional boxer competing in the super welterweight division. As of early 2025, Tim Tszyu remains undefeated and is fighting for world titles (Wikipedia).
What is Tim Tszyu’s boxing record?
Tim Tszyu’s record is undefeated (24‑0 as of early 2025), with 17 knockouts. He has won the WBO Global, Australian, and Commonwealth titles, and is a top contender in the super welterweight division.
How much is Tim Tszyu worth?
Exact net worth figures are not publicly available, but Tim Tszyu’s earnings from major fights and endorsements likely place him among the higher‑earning Australian boxers.
The consequence: Tim’s rise has shifted the spotlight from Kostya’s past to a new, continuing story.
Three fights, two losses, one defining win: the pattern of Tszyu’s career against elite opposition.
| Opponent | Year | Result | Method |
|---|---|---|---|
| Vince Phillips | 1997 | Loss | TKO (10th round) |
| Zab Judah | 2001 | Win | TKO (6th round) |
| Ricky Hatton | 2005 | Loss | RTD (11th round) |
Timeline of Kostya Tszyu’s career
- 1992: Professional debut (Sport Australia Hall of Fame)
- 1995: Won IBF light welterweight title (Sport Australia Hall of Fame)
- 1997: Lost to Vince Phillips (International Boxing Hall of Fame)
- 1998: Won WBC title (Wikipedia)
- 2000‑2001: Unified titles to become undisputed champion (Wikipedia)
- 2005: Lost to Ricky Hatton; announced retirement (Wikipedia)
- 2011: Inducted into Sport Australia Hall of Fame and International Boxing Hall of Fame (Sport Australia Hall of Fame; International Boxing Hall of Fame)
What we know and what remains unclear
Confirmed facts
- Kostya Tszyu was born 19 September 1969 in Serov, Russia (International Boxing Hall of Fame)
- He lives in Sydney, Australia (Wikipedia)
- His professional record is 31-2 (25 KOs) (International Boxing Hall of Fame)
- He was inducted into the Sport Australia Hall of Fame in 2011 (Sport Australia Hall of Fame)
- He is the first undisputed junior welterweight champion in 30 years (Wikipedia)
What’s unclear
- Exact net worth of Kostya Tszyu
- Current training or coaching activities
- Details of his divorce from Anastasia Tszyu
- Whether he will return to the sport in a formal role
- The exact number of push-ups Kostya Tszyu can do (often cited in viral challenges)
Voices on Tszyu’s legacy
“Not only did he beat him, he broke him.”
Ricky Hatton, Sky Sports
“Kostya Tszyu is one of the greatest light welterweights of all time, a champion who unified the division and set a standard for Australian boxing.”
Sport Australia Hall of Fame induction citation, Sport Australia Hall of Fame
For Australian boxing fans, the legacy of Kostya Tszyu is clear: a champion who set the standard, and whose son Tim is now the one to beat. The choice for the next generation is whether to build on that foundation or forge a separate path—but the Thunder from Down Under already left his mark.
For more on legendary sports figures, read about Sir Donald Bradman: Stats, Career, Why He Is the Greatest Batsman and Ip Man: Real Life vs Movie – Facts, Fights, and Legacy.
espn.com, sports.yahoo.com, reddit.com, skysports.com, martialbot.com, reddit.com
Frequently asked questions
Did Kostya Tszyu ever fight in the Olympics?
Yes, he represented Russia at the 1988 Seoul Olympics in the light welterweight division, but did not medal (International Boxing Hall of Fame).
What weight class did Kostya Tszyu fight in?
He fought in the light welterweight (junior welterweight) division, with a 140‑pound limit.
How many knockout wins did Kostya Tszyu have?
He had 25 knockout wins in his 31 victories (Sport Australia Hall of Fame).
Is Kostya Tszyu still involved in boxing?
He is not actively involved in training or promoting, but his sons Tim and Nikita are professional boxers.
Who trained Kostya Tszyu?
He was trained by Johnny Lewis in Australia for most of his professional career.
What is Kostya Tszyu’s nickname?
His nickname is “Thunder from Down Under”.
How tall is Kostya Tszyu?
He is 5 feet 10 inches (178 cm) tall.
What is Kostya Tszyu’s reach?
His reach is 67 inches (170 cm).
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Daniel Harper is Editor-in-Chief at Coast Brief, overseeing editorial standards, publication decisions and corrections.