Nadal eases into Aussie quarters; Davydenko out

Melbourne, Australia (Sports Network) - Rafael Nadal easily moved into the Australian Open quarterfinals on Sunday when Paul-Henri Mathieu retired in the second set of their fourth-round match, but Nikolay Davydenko was among the upset victims as the first week of the year's first major concluded.

The second-seeded Nadal had built a 6-4, 3-0 lead when Mathieu called it quits for what appeared to be a calf problem. The 23rd-seeded Frenchman twice received treatment in the first set, then decided he couldn't continue after dropping serve twice in the second.

Nadal will next meet Finland's Jarkko Nieminen in the quarterfinals. Nieminen knocked off Germany's Philipp Kohlschreiber, 3-6, 7-6 (9-7), 7-6 (11-9), 6-3. Kohlschreiber had eliminated sixth-seeded American Andy Roddick in his last match and was coming off a title in Auckland last week.

Nieminen, seeded 24th, saved a combined 11 set points between the second and third sets before advancing...Fulls Story