* Live updates from the fourth round at Flushing Meadows * The only man who can beat Djokovic this season is himself * Drop Simon an email | Tweet @Simon_Burnton 5.57pm BST 2ND SET: WILLIAMS 6-3, 0-1 SAKKARI* It didn’t take long for Sakkari to regroup. There’s an excellent wrongfooting crosscourt backhand here, another down the line that clips the back of the line to make it 40-15, and a second-serve ace to win it from there. 5.52pm BST 1ST SET: WILLIAMS* 6-3 SAKKARI Serena wins the first point with a forehand of great power and immaculate precision, follows that with an ace out wide, and the Greek realises this set is probably not going to go her way. It ends with another ace, down the middle this time. On Armstrong, De Minaur wins the second set and now has a firm grip on his match, leading Pospisil as he does 7-6, 6-3. Continue reading...