[2] He holds notable wins over Gokhan Saki, Ray Sefo, Alexander Ustinov, Freddy Kemayo (twice), and Alexey Ignashov.

Bregy made his K-1 debut on June 3, 2000 at K-1 Fight Night 2000 in Zürich, Switzerland, against Reinhard Ulz.

[3] 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.

He was matched up against the defending K-1 World champion Semmy Schilt, and lost the fight by first round left hook KO.

He knocked out South African Jan Nortje in quarterfinals and was stopped by Errol Zimmerman in semis at the end of third round by a flurry of punches.