Rafael Nadal has been knocked out of the US Open in a shock four-set loss to American Frances Tiafoe.
The men's and women's singles competitions are now into the quarter-final stage, with Norway's Casper Rudd in the men's winning through to the semifinals this morning.
The women's games are playing this morning and are still to be decided.
Australian star Nick Kyrgios just may be the favourite in the men's field now, with his quarterfinal starting at 12-15 this afternoon.
Tennis correspondent Dave Worsley spoke to Susie Ferguson.
