MANILA, Philippines – Andy Murray marched into the quarter-finals of the Sony Open with a straight sets win over Andreas Seppi.The second-seeded Murray broke the Italian in the first set of the match to beat Seppi, 6-2, 6-4. Meanwhile, third-seeded David Ferrer needed only 81 minutes to defeat Japan’s Kei Nishikori and advance to the quarter-finals as well.