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Melbourne - American No 1 and ninth seed John Isner was knocked out of the Australian Open on Monday in one of the biggest shocks of the first round.
The 6-foot-10 (2.08m) Isner was beaten by 6-foot-11 (2.11m) fellow American Reilly Opelka 7-6 (7/4), 7-6 (8/6), 6-7 (4/7), 7-6 (7/5) in a battle of the giants.
No fewer than 87 aces were powered down between the big-serving pair in what is the tallest match in Grand Slam history. There was just one break apiece registered in the fourth set of a match that lasted 2 hours and 58 minutes.
Isner, 33, had not lost a Grand Slam match to a player ranked as low as No 97 Opelka, who is 12 years his junior, since retiring due to a foot injury while trailing 106th-ranked Martin Klizan in the first round at Melbourne in 2014.
Opelka has never before reached the second round of a Grand Slam and will next face Italy's world No 102 Thomas Fabbiano, who beat Australian wildcard Jason Kubler 6-4, 7-6 (7/1), 2-6, 6-3.
Results from Day 1 of the Australian Open on Monday:
Men
Round 1
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
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)
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
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
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)
Robin Haase (NED) bt Guillermo Garcia-Lopez (ESP) 7-5, 6-4, 7-5
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
Rafael Nadal (ESP x2) bt James Duckworth (AUS) 6-4, 6-3, 7-5
Women
Round 1
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
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
Sloane Stephens (USA x5) bt Taylor Townsend (USA) 6-4, 6-2
Tímea 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
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
