Sergey TkachenkoSergey Tkachenko is a Kazakhstani ski jumper. He competed in two events at the 2018 Winter Olympics.Summer world recordOn 11 July 2018 at the opening event of Burabay Ski Jumps hill in Shchuchinsk, Kazakhstan he set the summer world record distance at 151 metres, longest standing on plastic mat.World CupStandingsIndividual starts (29)