Results from day four of the Australian Open at Melbourne Park on Thursday: Men's singles 2nd rd Andrey Rublev (RUS x7) bt Thiago Monteiro (BRA) 6-4, 6-4, 7-6 (10/8) Feliciano Lopez (ESP) bt Lorenzo Sonego (ITA x31) 5-7, 3-6, 6-3, 7-5, 6-4 Casper Ruud (NOR x24) bt Tommy Paul (USA) 3-6, 6-2, 6-4, 7-5 Lloyd Harris (RSA) bt Alexei Popyrin (AUS) 6-2, 1-6, 6-3, 6-7 (5/7), 6-3 Karen Khachanov (RUS x19) bt Ricardas Berankis (LTU) 6-2, 6-4, 6-4 Women's singles 2nd rd Ashleigh Barty (AUS x1) bt Daria Gavrilova (AUS) 6-1, 7-6 (9/7) Ekaterina Alexandrova (RUS x29) bt Barbora Krejcikova (CZE) 6-3, 7-6 (7/4) Shelby Rogers (USA) bt Olga Danilovic (SRB) 6-2, 6-3 Belinda Bencic (SUI x11) bt Svetlana Kuznetsova (RUS) 7-5, 2-6, 6-4 Elise Mertens (BEL x18) bt Lin Zhu (CHN) 7-6 (10/8), 6-1 Karolina Muchova (CZE x25) bt Mona Barthel (GER) 6-4, 6-1 Karolina Pliskova (CZE x6) bt Danielle Collins (USA) 7-5, 6-2 Kaia Kanepi (EST) bt Sofia Kenin (USA x4) 6-3, 6-2 Donna Vekic (CRO x28) bt Nadia Podoroska (ARG) 6-2, 6-2 Yulia Putintseva (KAZ x26) bt Alison Van Uytvanck (BEL) 6-4, 1-6, 6-2 afp