sentences:  Leko holds notable wins over 3x K-1 World Grand Prix champion Remy Bonjasky, K-1 Heavyweight champion Badr Hari, world Muay Thai champion Mike Bernardo, 3x K-1 World Grand Prix champion Peter Aerts (x2), K-1 legend Ray Sefo, world Muay Thai champion Alexey Ignashov (x2), and K-1 Grand Prix finalist Francisco Filho.Leko was successful in both Muay Thai/kickboxing and K-1 during the late 1990s and early 2000s, despite often conceding height and weight to some of the larger men in K-1.He won various K-1 tournaments and Muay Thai titles.