Bianca Andreescu stuns Serena Williams to win US Open final

Bianca Andreescu has become Canadas first grand slam champion of the open era, beating Serena Williams 6-3, 7-5 Serena Williams, so strong of limb and spirit, could not disguise her inner frailty when she stumbled at the tape in the US Open final, and tennis embraced another new teenage champion, Bianca Andreescu, who took an hour and 40 minutes to win 6-3, 7-5 on her grand slam final debut. It was a match of uneven quality but festooned in unalloyed drama and much history. It also crowned the best first appearance in the tournament decider since Venus Williams lost to Martina Hingis in the 1997 final. Serena has reached four of six slam finals (most recently meltdown when losing to …