Nadal loses at quarter-finals, hopes over for 4 Slams in a row

Rafael Nadal of Spain reacts during his quarter-final match against compatriot David Ferrer at the Australian Open tennis tournament in Melbourne Jan 26, 2011.MELBOURNE, Australia - Rafael Nadal's bid to win four straight Grand Slam tournaments is over.An injury-affected Nadal lost for the second straight year in the Australian Open quarterfinals, going down 6-4, 6-2, 6-3 Wednesday to fellow