Round of 16 set

Day six at the 2017 US Open saw the completion of third round matches and we now know who meets who in the round of sixteen.

No major upsets but a classic match between Coco Vandeweghe (20) and Aga Radwanska (10) lasted 2 hours 56 minutes before the American delivered a three set victory, one of the best wins of her career.

A match of turning fortunes, Vandeweghe attacked as she is known to do, but added some touch to her game which surprised Radwanska in set one, Coco going to the net twice as much, hitting twice as many winners and edging a service break extra to take the lead 7-5.

Radwanska settled in set two and the match just became higher in standard, winners outnumbering unforced errors for both players.  The only service break for the set came in the tenth and last game when Aga drilled a backhand winner on her first set point.

The final set was a pressure test and each player lived up to it.  Although Radwanska dropped her serve in the opening game, she fought hard and broke back in the fourth to level at 2-2. 

The next three games also were service breaks, each sealed with forehand winners, and it was Coco who finally settled the madness to take a 5-3 lead.

Aga held her nerve and serve, demanding that Coco serve the match out.

An ace at a nervous 30-30 was enough to set up match point and an error from Aga gave victory to the American.

Vandeweghe will face Lucie Safarova in the round of sixteen after the Czech player removed Japanese threat Kurumi Nara in an unseeded third round match.

Other fourth round matches decided will be:

Karolina Pliskova (1) v Jennifer Brady - Pliskova came back from a set down and saving match point against Shuai Zhang, while Brady knocked out Monica Niculescu in an absorbing clash ending in a tie break.

Elina Svitolina (4) v Madison Keys (15) - Svitolina defeated a brave Shelby Rogers and Keys came from behind to beat Elena Vesnina (17) who had appeared the winner for much of the match.

Daria Kasatkina v Kaia Kanepi - unseeded player Kasatkina beat Roland Garros champ Ostapenko and equally unseeded Kanepi removed the remaining Japanese entry Naomi Osaka.

The men's four third round matches left were results largely expected, except maybe for Juan Martin del Potro (24) easily defeating 12th seed Roberto Bautista Agut.

But this is hardcourt and del Potro is a former US Open champion, ranked below his talent.

The round of sixteen now includes:

Roger Federer (3) v Philipp Kohlschreiber (33) - Federer ended The hopes of Feliciano Lopez and Kohlschreiber deleted the final Aussie John Millman.

Rafa Nadal (1) v Alexandr Dolgopolov - Nadal defeated Leonardo Mayer and Dolgopolov handed Viktor Troicki his marching orders.

David Goffin (9) v Andrey Rublev - Goffin best Gael Monfils (18) who sadly had to retire with injury, and Rublev beat Damir Dzumhur.

Juan Martin del Potro (24) v Dominic Thiem (6) - Thiem defeated Adrian Mannarino (30)

It seems more than likely that a Federer / Nadal semi final will occur, and this would be the first time the two have ever played each other in a US Open match.

The mouth watering fourth round clash between Petra Kvitova (13) and Garbine Muguruza (3) is scheduled for Day Seven first night match on Arthur Ashe Stadium.