Melbourne - Last year's Australian Open runner-up Marin Cilic wasted little time in reaching the second round on Monday with a 6-2, 6-4, 7-6 (7/3) win over Australian Bernard Tomic.
Sixth seed Cilic, who lost an epic final in five sets to Roger Federer a year ago, took a shade over two hours to progress on Margaret Court Arena.
The former US Open champion, who led Croatia to a Davis Cup trophy in November, skipped the warm-up Maharashtra ATP tournament with a stiff knee, but showed no signs of the injury against Tomic.
The 30-year-old's victory set up a second-round clash with American Mackenzie McDonald.
Results from Day 1 of the Australian Open on Monday:
Men
Round 1
Mackenzie McDonald (USA) bt Andrey Rublev (RUS) 6-4, 6-4, 2-6, 6-4
Radu Albot (MDA) bt Michael Mmoh (USA) 3-6, 6-3, 6-4, 6-2
Fernando Verdasco (ESP x26) bt Miomir Kecmanovic (SRB) 7-6 (7/5), 6-3, 6-3
John Millman (AUS) bt Federico Del Bonis (ARG) 6-3, 3-6, 7-6 (7/3), 6-2
Yoshihito Nishioka (JPN) bt Tennys Sandgren (USA) 6-4, 7-6 (7/5), 4-6, 6-4
Karen Khachanov (RUS x10) bt Peter Gojowczyk (GER) 3-6, 6-3, 6-4, 6-3
Stefanos Tsitsipas (GRE x14) bt Matteo Berrettini (ITA) 6-7 (3/7), 6-4, 6-3, 7-6 (7/4)
Viktor Troicki (SRB) bt Roberto Carballes (ESP) 6-1, 1-6, 2-6, 6-1, 6-4
Stefano Travaglia (ITA) bt Guido Andreozzi (ARG) 6-7 (3/7), 6-2, 6-3, 6-2
Nikoloz Basilashvili (GEO x19) bt Christopher Eubanks (USA) 6-4, 4-6, 7-6 (8/6), 6-3
Gael Monfils (FRA x30) bt Damir Dzumhur (BIH) 6-0, 6-4, 6-0
Taylor Fritz (USA) bt Cameron Norrie (GBR) 6-3, 7-6 (8/6), 6-2
Daniel Evans (GBR) bt Tatsuma Ito (JPN) 7-5, 6-1, 7-6 (10/8)
Kevin Anderson (RSA x5) bt Adrian Mannarino (FRA) 6-3, 5-7, 6-2, 6-1
Frances Tiafoe (USA) bt Prajnesh Gunneswaran (IND) 7-6 (9/7), 6-3, 6-3
Jordan Thompson (AUS) bt Feliciano Lopez (ESP) 6-1, 7-6 (7/0), 6-3
Andreas Seppi (ITA) bt Steve Johnson (USA x31) 6-4, 4-6, 6-4, 6-3
Grigor Dimitrov (BUL x20) bt Janko Tipsarevic (SRB) 4-6, 6-3, 6-1, 6-4
Pablo Cuevas (URU) bt Dusan Lajovic (SRB) 6-4, 7-5, 6-1
Thomas Fabbiano (ITA) bt Jason Kubler (AUS) 6-4, 7-6 (7/1), 2-6, 6-3
Reilly Opelka (USA) bt John Isner (USA x9) 7-6 (7/4), 7-6 (8/6), 6-7 (4/7), 7-6 (7/5)
Tomas Berdych (CZE) bt Kyle Edmund (GBR x13) 6-3, 6-0, 7-5
Robin Haase (NED) bt Guillermo Garc1a-Lopez (ESP) 7-5, 6-4, 7-5
Denis Kudla (USA) bt Marc Polmans (AUS) 5-7, 1-6, 6-2, 6-3, 6-2
Diego Schwartzman (ARG x18) bt Rudolf Molleker (GER) 6-1, 6-3, 4-6, 6-0
Alex De Minaur (AUS x27) bt Pedro Sousa (POR) 6-4, 7-5, 6-4
Henri Laaksonen (SUI) bt Mirza Basic (BIH) 6-4, 7-6 (7/4), 4-6, 6-3
Matthew Ebden (AUS) bt Jan-Lennard Struff (GER) 1-6, 6-4, 6-3, 6-4
Rafael Nadal (ESP x2) bt James Duckworth 6-4, 6-3, 7-5
Roberto Bautista (ESP x22) bt Andy Murray (SCO) 6-4, 6-4, 6-7 (5/7), 6-7 (4/7), 6-2
Roger Federer (SUI x3) bt Denis Istomin (UZB) 6-3, 6-4, 6-4
Marin Cilic (CRO x6) bt Bernard Tomic (AUS) 6-2, 6-4, 7-6 (7/3)
Women
Round 1
Irina Begu (ROM) bt Andrea Petkovic (GER) 6-7 (3/7), 4-3 retired
Belinda Bencic (SUI) bt Katerina Siniakova (CZE) 6-4, 2-6, 6-3
Yulia Putintseva (KAZ) bt Barbora Zahlavova Strycova (CZE x32) 6-4, 7-6 (7/1)
Lesya Tsurenko (UKR x24) bt Ekaterina Alexandrova (RUS) 6-4, 7-6 (7/4)
Amanda Anisimova (USA) bt Monica Niculescu (ROM) 7-6 (7/3), 6-4
Katie Boulter (GBR) bt Ekaterina Makarova (RUS) 6-0, 4-6, 7-6 (10/6)
Aryna Sabalenka (BLR x11) bt Anna Kalinskaya (RUS) 6-1, 6-4
Ashleigh Barty (AUS x15) bt Luksika Kumkhum (THA) 6-2, 6-2
Wang Yafan (CHN) bt Ellen Perez (AUS) 6-4, 6-0
Astra Sharma (AUS) bt Priscilla Hon (AUS) 7-5, 4-6, 6-1
Maria Sakkari (GRE) bt Jelena Ostapenko (LAT x22) 6-1, 3-6, 6-2
Maria Sharapova (RUS x30) bt Harriet Dart (GBR) 6-0, 6-0
Rebecca Peterson (SWE) bt Sorana Cirstea (ROU) 6-4, 6-1
Johanna Larsson (SWE) bt Vera Lapko (BLR) 7-6 (7/5), 3-0 retired
Caroline Wozniacki (DEN x3) bt Alison Van Uytvanck (BEL) 6-3, 6-4
Sloane Stephens (USA x5) bt Taylor Townsend (USA) 6-4, 6-2
Timea Babos (HUN) bt Ons Jabeur (TUN) 7-6 (7/5), 7-6 (7/3)
Marketa Vondrousova (CZE) bt Evgeniya Rodina (RUS) 6-3, 6-2
Petra Martic (CRO x31) bt Heather Watson (GBR) 6-1, 6-2
Anett Kontaveit (EST x20) bt Sara Sorribes (ESP) 6-3, 6-2
Aliaksandra Sasnovich (BLR) bt Kirsten Flipkens (BEL) 6-1, 6-1
Anastasia Pavlyuchenkova (RUS) bt Monica Puig (PUR) 6-4, 6-3
Kiki Bertens (NED x9) bt Alison Riske (USA) 6-3, 6-3
Danielle Collins (USA) bt Julia Georges (GER x14) 2-6, 7-6 (7/5), 6-4
Sachia Vickery (USA) bt Ysaline Bonaventure (BEL) 2-6, 6-4, 6-4
Zoe Hives (AUS) bt Bethanie Mattek-Sands (USA) 6-1, 6-2
Caroline Garcia (FRA x19) bt Jessika Ponchet (FRA) 6-2, 6-3
Donna Vekic (CRO x29) bt Kristina Mladenovic (FRA) 6-2, 6-4
Kimberly Birrell (AUS) bt Paula Badosa (ESP) 6-4, 6-2
Beatriz Haddad Maia (BRA) bt Bernarda Pera (USA) 6-3, 5-7, 6-4
Angelique Kerber (GER x2) bt Polona Hercog (SLO) 6-2, 6-2
Petra Kvitova (CZE x8) bt Magdalena Rybarikova (SVK) 6-3, 6-2
