DAY FOUR ROUND TWO PLAYER OF THE DAY Victoria Azarenka - is the two-time Open winner back to her best? She smashed Montenegrin Danka Kovini in a tick over an hour and has dropped just three games in the opening two rounds
KEY MOMENT Sam Groth looked like he would finally hold serve at 40-0 but Andy Murray managed to turn things around, break the Australian again and take the first set 6-0. It was confirmation of just how lopsided the match would be 
STAT OF THE DAY John Isner has a tournament-high 57 aces and is yet to face a solitary break point. Even by the towering American's standards, he is serving incredibly well
QUOTE OF THE DAY 'There's a few nerves. I wasn't making first serves, wasn't making first volleys' AUstralia's 28-year-old SAM GROTH admits the pressure of facing ANdy Murray on centre court might have got to him RESULTS MEN'S SECOND ROUND John Millman (AUS) bt Gilles Muller (LUX) 4-6 6-4 6-2 4-6 7-5. 8-David Ferrer (ESP) bt WC-Lleyton Hewitt (AUS) 6-2 6-4 6-4. Lukas Rosol (CZE) bt 25-Jack Sock (USA) 7-6(6) 7-6(5) 6-3.
4-Stanislas Wawrinka (SUI) bt Q-Radek Stepanek (CZE) 6-2 6-3 6-4. Andrey Kuznetsov (RUS) bt 30-Jeremy Chardy (FRA) 6-4 7-6(5) 7-6(5).
18 -Feliciano Lopez (ESP) bt Guido Pella (ARG) 7-6(2) 6-7(4) 7-6(3) 6-7(8) 6-4. 31-Steve Johnson (USA) bt Thomaz Bellucci (BRA) 6-3 6-2 6-2. 21-Viktor Troicki (SRB) bt Q-Tim Smyczek (USA) 6-4 7-6(5) 7-6(4). Dudi Sela (ISR) bt Fernando Verdasco (ESP) 4-6 6-3 6-3 7-6(4). Q-Stephane Robert (FRA) bt Rajeev Ram (USA) 6-1 6-7(6) 4-6 7-5 7-5. 13-Milos Raonic (CAN) bt Tommy Robredo (ESP) 7-6(6) 7-6(5) 7-5. 2-Andy Murray (GBR) bt Samuel Groth (AUS) 6-0 6-4 6-1.
32-Joao Sousa (POR) bt Santiago Giraldo (COL) 6-3 7-5 3-6 6-1. 10-John Isner (USA) bt Marcel Granollers (ESP) 6-3 7-6(6) 7-6(2). 23-Gael Monfils (FRA) bt Nicolas Mahut (FRA) 7-5 6-4 6-1.
WOMEN'S SECOND ROUND Q-Zhang Shuai (CHN) bt Alize Cornet (FRA) 6-3 6-3.
15-Madison Keys (USA) bt Yaroslava Shvedova (KAZ) 6-7(4) 6-3 6-3. Laura Siegemund (GER) bt 19-Jelena Jankovic (SRB) 3-6 7-6(5) 6-4. Madison Brengle (USA) bt Johanna Larsson (SWE) 7-5 4-6 6-1.
Denisa Allertova (CZE) bt 30-Sabine Lisicki (GER) 6-3 2-6 6-4. 14-Victoria Azarenka (BLR) bt Danka Kovinic (MNE) 6-1 6-2.
3-Garbine Muguruza (ESP) bt Kirsten Flipkens (BEL) 6-4 6-2.
Barbora Strycova (CZE) bt Vania King (USA) 7-6(5) 6-4.
Q-Naomi Osaka (JPN) bt 18-Elina Svitolina (UKR) 6-4 6-4.
Varvara Lepchenko (USA) bt Lara Arruabarrena (ESP) 7-6(7) 6-4. Johanna Konta (GBR) bt Zheng Saisai (CHN) 6-2 6-3.
20-Ana Ivanovic (SRB) bt Q-Anastasija Sevastova (LAT) 6-3 6-3. TODAY'SSCHEDULE ROD LAVER ARENA 11am: 12-B Bencic (SUI) v K Bondarenko (UKR), L Davis (USA) v 5-Maria Sharapova (RUS), 3-R Federer (SUI) v 27-G Dimitrov (BUL) 7pm: 1-S Williams (USA) v D Kasatkina (RUS), 29-N Kyrgios (AUS) v 6-T Berdych (CZE)
HISENSE ARENA 11am: 19-D Thiem (AUT) v 15-D Goffin (BEL), A-L Friedsam (GER) v 13-R Vinci (ITA), F Delbonis (ARG) v 14-G Simon (FRA) Not Before 5:30pm: 28-K Mladenovic (FRA) v D Gavrilova (AUS)
MARGARET COURT ARENA11am: 26-G Garcia-Lopez (ESP) v 7-K Nishikori (JPN), 9-J-W Tsonga (FRA) v P-H Herbert (FRA), 4-A Radwanska (POL) v M Puig (PUR) 7pm: 1-N Djokovic (SRB) v 28-A Seppi (ITA), 10-C SuÃƒÂ¡rez Navarro (ESP) v E Kulichkova (RUS)