Summary
U.S. Open champion Bianca Andreescu paid Naomi Osaka the ultimate compliment on the eve of their first match, saying the Japanese player's game has similarities with that of Serena Williams.
Osaka, a former world No. 1, is also in form, yet to drop a set in three matches in Beijing and fresh from winning the Pan Pacific Open in Japan.
Osaka, ranked four, reeled off 10 games in a row to seal victory.
Into the last eight in hot and hazy Beijing was reigning champion Caroline Wozniacki, another former world No. 1 .
It is the three-time Grand Slam champion's first ATP singles quarterfinal for a year.
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