sentences:  His fortunes varied in the later stages of the 2000s, though he did win various more trophies and titles after his 2005 return to the kickboxing and Muay Thai world.On 22nd of february 2020 Stefan Leko will make his appearance against Koos Wessels Boer, during 'Return of the legends' in Steenwijk (Holland).Leko first fought in K-1 in 1997, age 22.