Tennis: Gael Monfils beats Reilly Opelka to reach Estoril Open last-eight

France's Gael Monfils reached the quarter-finals of the Estoril Open after defeating American Reilly Opelka 3-6, 6-3, 6-0. Third seed Monfils will now face either compatriot Jeremy Chardy or Spanish qualifier Alejandro Davidovich Fokina in the last eight.