A lone break by San Luis Somos Todos' Emanuel Guevara saw him win the fifth stage of the 7th Tour De San Luis in Argentina.
Today's stage was a 169km stage from Juana Koslay to Carolina and saw Hacecky and Emanuel Guevara take a ten second lead on the peloton after 57 kilometres.
From then on, he went away to take a solo victory.
Race leader Michel Kwaitkowski looked to be keeping his jersey but Daniel Diaz sneaked in to finish second and take control of the race which has two stages to go.
Tejay Van Garderen finished in a group of riders with Alberto Contador, some 1.21 behind Guevara but the American keeps his second place in the general classification.
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