Querrey brilliance

The first lot of quarter finalists have been established at Flushing Meadows, and Americans are front and centre.

Sloane Stephens is enjoying her comeback from injury in no uncertain terms, her latest  victim Julia Georges (30).  Goerges dropped the first set but looked the goods after levelling with momentum going into the decider.

However Stephens put her foot down, breaking in both the fourth and sixth games and won her way into the final eight 6-3 3-6 6-1.

The second American into the quarters is Venus Williams (9! who also took three sets to battle past valiant Spaniard Carla Suarez Navarro.

Like Stephens, against the match trend, Williams trounced Carla in the third set, breaking serve three times, winning 65% of points on the Spanish serve and facing no break points on her own delivery.

Garbine Muguruza (3) was surprisingly cut down in the round of sixteen by a stunning Petra Kvitova (13).  Muguruza led 4-1 with a break in set one, and had chances to break again for 5-1, but Kvitova served big at the right times.

Next game she broke back and from that moment she controlled the match.

A tie break decided set one and Kvitova stole the first one from the third seed this tournament.

Muguruza fought back in the first game of set two, breaking the Czech serve.

That was the last gasp as Kvitova won the next four games, placing the latest Wimbledon champ in peril.  The two time previous Wimbledon champ proceeded to save a number of break back points and won a quarter final spot against Venus Williams.

Sam Querrey (17) is running the home campaign for the men's singles, and he played his best match for the tournament against Mischa Zverev (23).

Losing only five games over three sets, Querrey hit 55 winners and only offered 8 unforced errors.  He won 35 of 38 points on his first serve.

Quarter final opposition will come from another big server Kevin Anderson (28).

Quarter finals decided:

Sam Querrey (17) v Kevin Anderson (28) - Anderson defeated Paolo Lorenzi

Pablo Carreno Busta (12) v Diego Schwartzman - Pablo defeated Denis Shapovalov and Schwartzman overcame Lucas Pouille (16)

Anastasija Sevastova (16) v Sloane Stephens - Sevastova ended Maria Sharapova's promising run in three sets.

Venus Williams (9) v Petra Kvitova (13)

The battle for number one in the WTA rankings is still alive with Muguruza hanging on to the live position.  Svitolina or Pliskova can take over depending on their performances against American opponents.

Nadal and Federer will be centre stage Day 8 of the US Open.