Take a look at the best photos from day three action at the US Open…
TAKE THAT: Petra Kvitova in action; Getty Images
SERVING IT UP: American John Isner is into the third round; Getty Images
WINNERS ARE GRINNERS: Caroline Wozniacki scored her first top 10 win of the season with a round two defeat of Svetlana Kuznetsova; Getty Images
CELEBRATION: Jo-Wilfried Tsonga reacts to his win; Getty Images
ONE TO WATCH: 2014 champion Marin Cilic is in good form; Getty Images
BATTLE: World No.2 Angelique Kerber survived a challenge against Mirjana Lucic-Baroni; Getty Images
UPSET: American Ryan Harrison celebrates his win over No.5 seed Milos Raonic; Getty Images
DISAPPOINTMENT: No.5 seed Milos Raonic walks off court after his shock loss to qualifer Ryan Harrison; Getty Images
ENTERTAINER: Gael Monfils was up to his normal tricks – and winning too; Getty Images
DOMINANT: Madison Keys only lost two games in her second round match; Getty Images
STRETCHED: Jack Sock reaches for a backhand during his win; Getty Images
QUIET ACHIEVER: No.15 seed Roberto Bautista Agut has qualified for the third round; Getty Images
A MATCH TO FORGET: Garbine Muguruza was not a happy camper during her straight-sets loss to Anastasija Sevastova at the US Open on Wednesday; Getty Images
CELEBRATION: Lativian Anastasija Sevastova reacts to beating world No.3 Garbine Muguruza; Getty Images
HISTORY MADE: The new Arthur Ashe Stadium roof was closed for the first time during the evening session; Getty Images
DETERMINED: Rafael Nadal was fired up to book a third round spot when he faced Italian Andreas Seppi; Getty Images
