As a child, Kostya was
hyperactive, so his father decided to take him to a boxing gym, where he would channel that energy by fighting older boys. He impressed the Soviet amateur team coaches and he was sent to the Soviet Union's amateur boxing travelling training camps, where he visited more than 30 countries while training and fighting in tournaments. He trained with that group 250 days a year, and won various tournaments, such as amateur boxing's world championships. At the
Cuban world championship tournament in 1987, he came in second place, and at the
1988 Summer Olympics, he lost in the third round. Tszyu was a member of the Soviet Army, but since he was selected as an
elite athlete, he was not required to serve the ordinary duty. He fought at the world championships once again, in Moscow in 1989, where he came in third place. In 1991, he went again to the amateur world championships, this time held in Sydney. This was a trip that would change his life forever. Not only was the third time his charm, but he felt enchanted with the sights of Sydney and its people, and decided he wanted to live in Australia. Following the
collapse of the Soviet Union in 1991, early the next year, Tszyu emigrated to Australia with his girlfriend, where they married in 1993 and became Australian citizens, settling in
Sans Souci, Sydney. Before marrying her, though, Tszyu had already turned professional, beating
Darrell Hiles by a
knockout in one round on 1 March 1992, at
Melbourne.
Highlights Schwerin Junior Open (57 kg),
Schwerin,
East Germany, April 1986: • Finals: Lost to Jörg Heidenreich (East Germany) by unanimous decision, 5–0 European Junior Championships (57 kg),
Copenhagen, Denmark, September 1986: • 1/8: Defeated Manuel Moreno (Spain) by unanimous decision, 5–0 • 1/4: Defeated Santo Serio (Italy) by unanimous decision, 5–0 • 1/2: Defeated
Daniel Dumitrescu (Romania) by unanimous decision, 5–0 • Finals: Defeated Fared Cheklat (France) by unanimous decision, 5–0 Soviet International Junior Tournament (60 kg),
Tbilisi,
Georgian SSR, December 1986: • Finals: Defeated Nikolay Dzhachvadze (Georgian SSR) RSC 3 World Junior Championships (60 kg),
Havana, Cuba, July 1987: • 1/4: Defeated D. Boyev (Bulgaria) RSC 3 • 1/2: Defeated Eduardo Rivas (Panama) KO 2 • Finals: Lost to
Juan Hernández Sierra (Cuba) by majority decision, 1–4 Soviet International Tournament (60 kg),
Leningrad, Soviet Union, December 1987: • Finals: Defeated Serik Nurkazov (Kazakh SSR) by unanimous decision, 5–0 Soviet National Championships (60 kg),
Tashkent,
Uzbek SSR, January 1988: • 1/16: Defeated Adylkan Bekbolotov (Kyrgyz SSR) by unanimous decision, 5–0 • 1/8: Defeated Vladimir Kravtsov (RSFSR) by unanimous decision, 5–0 • 1/4: Defeated Serik Nurkazov (Kazakh SSR) by unanimous decision, 5–0 • 1/2: Defeated
Samson Khachatryan (Armenian SSR) by unanimous decision, 5–0 • Finals: Lost to
Orzubek Nazarov (Kyrgyz SSR) by split decision, 2–3 USA–USSR Duals (60 kg),
Moscow, Soviet Union, March 1988: • Defeated Donald Stokes (United States) on points, 16–8 Pre-Olympic Tournament (60 kg),
Seoul, South Korea, March 1988: • Finals: Defeated
Andreas Zülow (East Germany) by majority decision, 4–1 Soviet International Tournament (60 kg),
Leningrad, Soviet Union, June 1988: • 1/2: Lost to
Julio González (Cuba) on points Summer Olympics (60 kg),
Seoul, South Korea, September 1988: • 1/32: Defeated
Leopoldo Cantancio (Philippines) KO 1 • 1/16: Defeated Sean Knight (Barbados) RSCH 1 • 1/8: Lost to
Andreas Zülow (East Germany) by split decision, 2–3 Soviet National Championships (60 kg),
Frunze,
Kyrgyz SSR, January 1989: • 1/2: Defeated Yevgeny Burchak (RSFSR) • Finals: Defeated
Orzubek Nazarov (Kyrgyz SSR) RSC 3 Golden Belt Tournament (60 kg),
Bucharest, Romania, April 1989: • (no data available) European Championships (60 kg),
Athens, Greece, May–June 1989: • 1/8: Defeated
Andreas Zülow (East Germany) by split decision, 3–2 • 1/4: Defeated
George Cramne (Sweden) by unanimous decision, 5–0 • 1/2: Defeated
Dave Anderson (Scotland) by walkover • Finals: Defeated
Daniel Dumitrescu (Romania) by majority decision, 4–1 World Championships (60 kg),
Moscow, Soviet Union, September 1989: • 1/8: Defeated Mark Ramsey (England) on points, 22–3 • 1/4: Defeated Bo Espensen (Denmark) RSCH 2 • 1/2: Lost to
Andreas Zülow (East Germany) on points, 14–17 Bulgaria–Europe Duals (60 kg),
Varna, Bulgaria, November 1989: • Defeated
Emil Chuprenski (Bulgaria) RET 2 Mayor's Cup (63,5 kg),
Manila, Philippines, November 1989: • 1/4: Defeated Nelson Factoranan (Philippines) KO 1 • 1/2: Defeated
Andreas Otto (East Germany) by decision • Finals: Defeated
Shannan Taylor (Australia) by unanimous decision, 5–0 King's Cup (63,5 kg),
Bangkok, Thailand, February 1990: • Finals: Defeated
Andreas Zülow (East Germany) on points, 17–7 USA–USSR Duals (63,5 kg),
Moscow, Soviet Union, April 1990: • Defeated
Terron Millett (United States) by unanimous decision, 3–0 Soviet National Championships (63,5 kg),
Lutsk,
Ukrainian SSR, April 1990: • 1/2: Defeated Vasily Kirilov (RSFSR) • Finals: Defeated Aleksandr Banin (Belarus SSR) by decision Goodwill Games (63,5 kg),
Seattle, Washington, July 1990: • 1/4: Defeated
Vukašin Dobrašinović (Yugoslavia) by walkover • 1/2: Defeated
Terron Millett (United States) by unanimous decision, 5–0 • Finals: Defeated Aleksandr Banin (Soviet Union) by unanimous decision, 5–0 Swedish International Tournament (67 kg),
Göteborg, Sweden, December 1990: • Finals: Defeated Sergey Pogosov (Soviet Union) RSC 3 Soviet National Championships (63,5 kg),
Kazan,
Tatar SSR, February 1991: • 1/2: Defeated Vasily Kirilov (RSFSR) • Finals: Defeated
Oleg Nikolayev (RSFSR) by unanimous decision, 5–0 USA–USSR Duals (63,5 kg),
Spokane, Washington, March 1991: • Lost to
Vernon Forrest (United States) by split decision, 2–3 European Championships (63,5 kg),
Göteborg, Sweden, May 1991: • 1/16: Defeated James Pender (Scotland) on points, 21–0 • 1/8: Defeated Darren McCarrick (England) RSC 1 • 1/4: Defeated Attila Arslan (Turkey) RSC 2 • 1/2: Defeated
Vukašin Dobrašinović (Yugoslavia) on points, 26–6 • Finals: Defeated
Andreas Zülow (Germany) on points, 33–11 World Championships (63,5 kg),
Sydney, Australia, November 1991: • 1/8: Defeated Albertano Caballero (Mexico) RSC 2 • 1/4: Defeated
Aníbal Acevedo (Puerto Rico) on points, 29–10 • 1/2: Defeated
Moses James (Nigeria) on points, 25–4 • Finals: Defeated
Vernon Forrest (United States) on points, 32–9
1992 Olympics He was the only Soviet boxer to win a gold medal at the 1991 World Championships in Sydney. Immediately at the Championships he was approached by local boxing promoters, deciding to pass up the
1992 Summer Olympics in favor of a professional career. A week later he signed with Australian promoter Bill Mordey as his manager and
Johnny Lewis as his trainer in Sydney. Tszyu finished his amateur career with 270 fights, 259 wins, 11 losses, no
stoppages and no draws. His professional debut was scheduled to take place in January 1992. Mordey described Tszyu as the best boxer he had seen in the past decade. ==Professional career==