Defending champion Stanislas Wawrinka continued his love affair with the hard courts Down Under by booking his place in the quarterfinals of the Australian Open 2015.

The 4^th-seeded Swiss fired 15 aces and scored 70 winners en route his hard-fought 7-6 6-4 4-6 7-6 triumph over in-form Spaniard Guillermo Garcia-Lopez at the Margaret Court Arena on Monday.

Up next, Wawrinka is scheduled to square-off against 5th-seeded Japanese sensation Kei Nishikori in the last-eight stage, who had no mercy in pulling off a 6-3 6-3 6-3 conquest of 9^th seed David Ferrer in the round of 16.

Meanwhile, 8^th seed Milos Raonic dodged a bullet off giant-killer Feliciano Lopez, prevailing in a thrilling 6-4 4-6 6-3 6-7 6-3 battle that went on for 3 hours and 5 minutes.

Moving on, the big-serving Canadian will either meet top seed Novak Djokovic for a place in the semifinals.

(Image courtesy: stevegtennis.com)