Stefanos Tsitsipas' surprise victory over Rafael Nadal means he reaches his fourth ATP final of the season. Rodrigo Jimenez / EPA
Stefanos Tsitsipas' surprise victory over Rafael Nadal means he reaches his fourth ATP final of the season. Rodrigo Jimenez / EPA

Stefanos Tsitsipas beats Rafael Nadal in 'one of my toughest wins' at Madrid Open