Germany’s Angelique Kerber backed up her status as the new world number one with a thrilling win over Czech Karolina Pliskova in the US Open final. Kerber, 28, won 6-3 4-6 6-4 in New York to add the US Open to her victory at the Australian Open in January. Pliskova’s semi-final win over Serena Williams had already ensured the German will top the new rankings on today. “All my dreams came true today and I’m just trying to enjoy the moment,” said Kerber. “It’s incredible. I’m standing here with a second Grand Slam trophy and it means so much to me.” Kerber was appearing in her third Grand Slam final of 2016, and the German played with the authority of a world number one in waiting. Pliskova, 24, went into the final with a WTA Tour-leading 447 aces this year and on an 11-match winning streak that included victory over Kerber in last month’s Cincinnati final.