Tennis: Nishikori, Osaka battle into Australian Open quarters

Japan's Kei Nishikori and Naomi Osaka both came from behind to reach the Australian Open quarterfinals on Monday, Nishikori needing five sets and over five hours to outlast Spaniard Pablo Carreno Busta.Nishikori made 67 unforced errors in the 5-hour, 5-minute marathon, but the eighth seed came out on top 6-7(8), 4-6, 7-6(4), 6-4, 7-6(8) over the 23rd-seeded Carreno Busta, who blew an 8-5 lead in the final tiebreak.Nishikori's win sets up a quarterfinal against top seed Novak Djokovic. Nishikori has not beaten the Serb since the semifinals of the 2014 U.S. Open and is 2-15 against him in his…READ FULL ARTICLE