MADRID, SPAIN - MAY 10: Stefanos Tsitsipas of Greece and Wesley Koolhof of Netherlands in action against Jean-Julien Rojer of Netherlands and Horia Tecau of Romania in the semi finals of the doubles during day seven of the Mutua Madrid Open at La Caja Magica on May 10, 2019 in Madrid, Spain. (Photo by Julian Finney/Getty Images)
