US Open: Tiafoe and Sabalenka advance to semi-finals –as it happened

Frances Tiafoe got the better of Andrey Rublev to delight the New York crowd after Aryna Sabalenka powered past Karolina Pliskova

First set: *Pliskova 1-5 Sabalenka (*denotes next server) Sabalenka has suffered issues with her serve in the past, but when it's firing - as it certainly is so far today - it's hard to stop. She powers through this service hold, and the first set is in sight.

First set: Pliskova 1-4 Sabalenka* (*denotes next server) A ten-shot rally ends with Sabalenka blasting an 85mph winner into the corner. Pliskova finds some welcome serve accuracy - a pair of aces get her on the board in this set.