Bregy made his
K-1 debut on June 3, 2000 at K-1 Fight Night 2000 in
Zürich,
Switzerland, against Reinhard Ulz. He won the fight by 2 round KO. On May 21, 2005, in
Stockholm,
Sweden, Bregy beat all three opponents Pavel Majer, Denis Grigoriev and
Gary Turner and won his first
K-1 tournament title. In 2006 Bregy continued his strong performance in K-1 World GP in Amsterdam, winning the tournament by three consecutive KO's over
Freddy Kemayo, Naoufal Benazzouz and Gokhan Saki and qualified himself for K-1 World GP final elimination 2006 in
Osaka,
Japan. He was matched up against the defending K-1 World champion
Semmy Schilt, and lost the fight by first round left hook KO. On February 9, 2008 at K-1 Europe Elimination GP in
Budapest,
Hungary, Bregy knocked out Paula Mataele and qualified for the K-1 European GP held in
Amsterdam,
Netherlands. ==Titles==