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.