Miami - Spanish third seed David Ferrer advanced to the quarter-finals of the WTA and ATP Miami Masters hardcourt event on Tuesday with a 6-4, 6-2 victory over Japan's 13th-seeded Kei Nishikori.
Ferrer won 84 percent of his first-serve points and five of nine break chances to eliminate Nishikori and book a last eight-date against Austria's Jurgen Melzer, who defeated Spain's Albert Ramos 2-6, 6-3, 6-3.
Fifth-ranked Ferrer improved to 3-2 lifetime against Nishikori, having avenged a round-of-16 loss at last year's London Olympics by defeating Nishikori in the fourth round of this year's Australian Open.
Nishikori, ranked 15th, won their first meeting in the third round of the 2008 US Open while Ferrer first beat him in 2011 at Tokyo.Results on Tuesday from the eighth day of the $8.5 million WTA and ATP Masters Miami hardcourt tournament (x denotes seeding):
David Ferrer (ESP x3) bt Kei Nishikori (JPN x13) 6-4, 6-2
Jurgen Melzer (AUT) bt Albert Ramos (ESP) 2-6, 6-3, 6-3
Richard Gasquet (FRA x8) bt Nicolas Almagro (ESP x10) 6-7 (3/7), 7-5, 7-6 (7/3)
Andy Murray (GBR x2) bt Andreas Seppi (ITA x16) 6-2, 6-4
Tomas Berdych (CZE x4) bt Sam Querrey (USA x17) 6-1, 6-1
Marin Cilic (CRO x9) bt Jo-Wilfried Tsonga (FRA x6) 7-5, 7-6 (7/4)
Gilles Simon (FRA x11) bt Janko Tipsarevic (SRB x7) 5-7, 6-2, 6-2
Tommy Haas (GER x15) bt Novak Djokovic (SRB x1) 6-2, 6-4
Serena Williams (USA x1) bt Li Na (CHN x5) 6-3, 7-6 (7/5)
Agnieszka Radwanska (POL x4) bt Kirsten Flipkens (BEL x30) 4-6, 6-4, 6-2