Action gets underway a little later on.
Canadian teenager Leylah Fernandez is into the semi finals of the women's singles at the US Open in New York.
She beat Elina Svitolina in 3 sets and will now face Aryna Sabalenka.
Daniil Medvedev is into the last 4 of the men's singles and will take on Felix Auger Aliassime.
The semi-final line-ups will be completed today.
In the women's singles, Emma Raducanu will hope her dream run can continue when she plays eleventh seed Belinda Bencic.
And Karolina Pliskova goes up against Maria Sakkari.
Men's top seed Novak Djokovic plays Matteo Berrettini in a re-run of the Wimbledon final.
While South Africa's Lloyd Harris plays a maiden Grand Slam quarter-final against fourth seed Alexander Zverev.
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