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Nick Kyrgios retires with foot injury; David Ferrer into ASB quarters

SYDNEY -- Four-time champion David Ferrer beat Australian qualifier Matthew Barton 6-2, 6-4 on Wednesday to reach the quarterfinals of Auckland's ASB Classic for the 10th time in 11 appearances.

Fourth-seeded South African Kevin Anderson beat another qualifier, Robin Haase of the Netherlands, 7-6 (8), 7-6 (5). Eighth-seeded Roberto Bautista Agut of Spain defeated American Donald Young 6-4, 7-6 (3).

At the Kooyong Classic exhibition tournament in Melbourne, Australian Nick Kyrgios retired from his match against David Goffin of Belgium because of a foot injury. Kyrgios, who led Australia to the Hopman Cup team event title last week, won the first set 7-6 (7-5) and was trailing 3-2 in the second when he said he couldn't continue.

"Hate withdrawing, so sorry to everyone ..." Kyrgios said on Twitter. "I just have to make sure I'm right for next week & I will be."

The Australian Open begins Monday in Melbourne.

Information from The Associated Press was used in this report.