László Kleinheisler is a Hungarian professional footballer who plays as a midfielder for Croatian club Hajduk Split, on loan from Greek side Panathinaikos.

Hrvatski nogometni klub Hajduk Split, commonly referred to as Hajduk Split or simply Hajduk, is a Croatian professional football club based in Split, that competes in the Croatian First League, the top tier in Croatian football. Since 1979, the club's home ground has been the 33,987-seater Stadion Poljud. The team's traditional home colours are white shirts with blue shorts and blue socks.