Kostya Tszyu (31-2, 25) was born in Serov, Russian SFSR, Soviet Union on September 19, 1969. At the age of 22 years on March 1, 1992, he made his professional boxing debut against Darrell Hiles, winning the fight via 1st-round TKO.
On his 14th career fight at 25 years old, Tszyu became a super-lightweight world champion on January 28, 1995 after defeating Jake Rodríguez via 6th-round TKO to win the IBF title.
Tszyu's last fight was a super-lightweight (IBF, The Ring) world-title defense against Ricky Hatton on June 4, 2005. He lost the fight via 11th-round retirement. He retired from the sport of boxing following this loss.
Some of Kostya Tszyu's best fights have been against Roger Mayweather, Juan Laporte, Livingstone Bramble, Oktay Urkal, Ben Tackie, Julio César Chávez and Rafael Ruelas.
Tszyu has 2 losses on his boxing record.
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
34  | Jun 4, 2005 35 years, 8 months 31-2 (25) | 26 years, 7 months 38-0 (28) | SLT | 11 | RTD | LOSS Lost IBF, The Ring |
33  | Nov 6, 2004 35 years, 1 months 31-1 (25) | 34 years, 2 months 55-3 (30) | SLT | 3 | TKO | WIN Defended IBF, The Ring |
32  | Jan 19, 2003 33 years, 4 months 30-1 (24) | 36 years, 6 months 43-5-2 (17) | SLT | 6 | RTD | WIN Defended WBA (Super), WBC, IBF, The Ring |
31  | May 18, 2002 32 years, 7 months 29-1 (23) | 28 years, 9 months 24-2 (15) | SLT | 12 | UD | WIN Defended WBA (Super), WBC, IBF, The Ring |
30  | Nov 3, 2001 32 years, 1 months 28-1 (23) | 24 years 27-0 (21) | SLT | 2 | TKO | WIN Won IBF, The Ring Defended WBA (Super), WBC Vacant |
29  | Jun 23, 2001 31 years, 9 months 27-1 (22) | 31 years, 5 months 28-0 (10) | SLT | 12 | UD | WIN Defended WBA (Super), WBC |
28 | Feb 3, 2001 31 years, 4 months 26-1 (22) | 30 years, 5 months 47-2 (28) | SLT | 7 | RTD | WIN Won WBA (Super) Defended WBC |
27  | Jul 29, 2000 30 years, 10 months 25-1 (21) | 38 years 103-4-2 (84) | SLT | 6 | TKO | WIN Defended WBC |
26 | Feb 12, 2000 30 years, 4 months 24-1 (20) | Ahmed Santos | SLT | 8 | TKO | WIN Defended WBC |
25  | Aug 21, 1999 29 years, 11 months 23-1 (19) | 28 years, 9 months 43-1-1 (33) | SLT | 10 | TKO | WIN Won WBC Vacant |
24 | Nov 28, 1998 29 years, 2 months 22-1 (18) | Diosbelys Hurtado | SLT | 5 | TKO | WIN Won WBC Interim |
23  | Aug 15, 1998 28 years, 10 months 21-1 (17) | 27 years, 3 months 52-3 (41) | 9 | TKO | WIN | |
22 | Apr 5, 1998 28 years, 6 months 20-1 (16) | Calvin Grove | 1 | KO | WIN | |
21 | Dec 6, 1997 28 years, 2 months 19-1 (15) | Ismael Armando Chaves | 3 | TKO | WIN | |
20  | May 31, 1997 27 years, 8 months 18-1 (14) | 33 years, 10 months 35-3 (24) | SLT | 10 | TKO | LOSS Lost IBF |
19 | Jan 18, 1997 27 years, 3 months 18-0 (14) | Leonardo Mas | 1 | TD | NC | |
18 | Sep 14, 1996 26 years, 11 months 18-0 (14) | Jan Piet Bergman | SLT | 6 | KO | WIN Defended IBF |
17 | May 24, 1996 26 years, 8 months 17-0 (13) | Corey Johnson | SLT | 4 | KO | WIN Defended IBF |
16 | Jan 20, 1996 26 years, 4 months 16-0 (12) | Hugo Pineda | SLT | 11 | TKO | WIN Defended IBF |
15  | Jun 25, 1995 25 years, 9 months 15-0 (11) | 34 years, 2 months 54-11 (32) | SLT | 12 | UD | WIN Defended IBF |
14 | Jan 28, 1995 25 years, 4 months 14-0 (11) | Jake Rodríguez | SLT | 6 | TKO | WIN Won IBF |
13 | Aug 29, 1994 24 years, 11 months 13-0 (10) | Pedro Sanchez | 4 | TKO | WIN | |
12 | May 2, 1994 24 years, 7 months 12-0 (9) | Angel Hernandez | 7 | RTD | WIN | |
11 | Jan 11, 1994 24 years, 3 months 11-0 (8) | Hector Lopez | 10 | UD | WIN | |
10  | Aug 23, 1993 23 years, 11 months 10-0 (8) | 32 years, 11 months 34-11-3 (22) | 10 | UD | WIN | |
9 | Jun 18, 1993 23 years, 8 months 9-0 (8) | Robert Rivera | 1 | KO | WIN | |
8 | May 14, 1993 23 years, 7 months 8-0 (7) | Larry LaCoursiere | 1 | TKO | WIN | |
7 | Jan 30, 1993 23 years, 4 months 7-0 (6) | Steve Larrimore | 2 | TKO | WIN | |
6 | Nov 13, 1992 23 years, 1 months 6-0 (5) | Sammy Fuentes | 1 | TKO | WIN | |
5 | Sep 11, 1992 22 years, 11 months 5-0 (4) | Daniel Ricardo Cusato | 7 | TKO | WIN | |
4  | Jul 23, 1992 22 years, 10 months 4-0 (3) | 32 years, 7 months 37-11-1 (19) | 10 | UD | WIN | |
3 | May 7, 1992 22 years, 7 months 3-0 (3) | Tony Jones | 2 | TKO | WIN | |
2 | Apr 2, 1992 22 years, 6 months 2-0 (2) | Nedrick Simmons | 1 | KO | WIN | |
1 | Mar 1, 1992 22 years, 5 months 1-0 (1) | Darrell Hiles | 1 | TKO | WIN |
