Second seed Elena Rybakina ended Chinese qualifier Zheng Qinwen's stirring U.S. Open run with a 3-6 6-1 6-4 victory on Wednesday, advancing to ​the semi-finals and securing the world number one ranking for the first time, Reuters reported. 

The Australian Open winner, who will replace Aryna Sabalenka at the top of the rankings when they are updated after the tournament, recovered from a slow start and struck 20 winners as she gradually broke down Zheng’s ​resistance.