(AP Photo/Aaron Favila)

MELBOURNE, Australia (AP) One contentious point, after five hours and five sets, had Pablo Carreno Busta screaming at the umpire and gave Kei Nishikori the shift in momentum he needed to clinch his place in the Australian Open quarterfinals.

After being two points from victory, Carreno Busta lost five straight, including that one in the last tiebreaker where he berated the chair umpire for not ruling a replay, allowing Nishikori to advance 6-7 (8), 4-6, 7-6 (4), 6-4, 7-6 (8).

It was the second time the 2014 U.S. Open finalist has had to come back from two sets down in the tournament, and the second time he's had to win in the new 10-point fifth-set super tiebreakers that were introduced at Melbourne Park this year.

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