Aryna Sabalenka extended her winning streak to 15 matches to reach the China Open quarter-finals with a straight-sets victory against Madison Keys.
World number two Sabalenka, 26, needed just 65 minutes to come through the tie 6-4 6-3.
The top seed will face either Karolina Muchova of the Czech Republic or Spain's Cristina Bucsa in the last eight in Beijing.
Sabalenka's last defeat came on 10 August in the quarter-finals of the Canadian Open.
The three-time Grand Slam champion has won 46 of her 57 singles matches in 2024.
Sabalenka claimed the Cincinnati Open and the US Open during her current unbeaten run.