Sabalenka knocked out of China Open in straight sets, Djokovic outlasts Zverev

BEIJING — Second-ranked Aryna Sabalenka was bundled out in the third round of the China Open in straight sets by the Czech Republic’s Nikola Bartunkova on Sunday. In the men’s draw, Novak Djokovic maintained his perfect record at the tournament with a 4-6, 6-4, 6-4 victory over U.S. Open champion Alexander Zverev in the quarterfinals. The No. 34-ranked Bartunkova defeated the four-time Grand Slam champion 6-4, 6-3 in just over an hour and a half leaving the tournament without its two top seeds in the first week. Newly crowned world No. 1 Elena Rybakina was ousted from the tournament on…