World number one Novak Djokovic raised his eyes and arms to the sky after beating Alexandr Dolgopolov to reach the Monte Carlo Masters quarters on Thursday just hours after learning of the death of his grandfather.
The Serb fought back to overcome his emotions and move past Dolgopolov 2-6 6-1 6-4.
He was crying as he left the court to thunderous applause from a packed crowd.
Djokovic learned of his grandfather's death while he was practising on Thursday morning. He had said how close he was to his grandfather, to whom he dedicated his victory in the recent Sony Ericsson Open in Miami.
Andy Murray also moved into the last eight after France's Julien Benneteau retired on Thursday. Murray was leading a fiercely contested opening set 6-5 when Benneteau quit, having fallen in the previous game when sliding to a wide ball and injuring his ankle.
In doubles, fifth seeds Leander Paes and Radek Stepanek beat Edouardo Schwank and Juan Cabal 6-3, 6-3 to enter the quarterfinal.