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
TOURNAMENT SUMMARY Seeds were dropping all over the place in the opening few days but there were fewer upsets early on day four. Murray and Azarenka continue to loom large as title contenders
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 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 ARENA 11am: 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)