But another four were eliminated on the hardcourts in China on Tuesday, one hugely controversially.
Marc Polmans went out in dramatic fashion after a two hour-34 minute battle with Italian Stefano Napolitano, disqualified when trailing 6-7 (3-7) 6-6 (6-6) after unintentionally hitting the umpire when losing his second match point.
Luke Saville was beaten 6-3 6-3 by Kazakhstan's Mikhail Kukushkin and Li Tu pushed American Aleksandar Kovacevic to three sets, but lost 2-6 7-6 (10-8) 5-7.
Top seed in qualifying Rinky Hijikata took just 80 minutes to see off Benjamin Lock of Zimbabwe 6-1 6-4, while James Duckworth also enjoyed a straight-sets victory, 7-6 (8-6) 6-2 over fellow Aussie James McCabe.
World No.256 Dane Sweeny was a 6-2 6-1 winner over South Korea's Seongchan Hong and world No.292 Philip Sekulic defeated Arthur Weber of France 6-4 6-3.
Alex de Minaur, Thanasi Kokkinakis, Jordan Thompson, Alexei Popyrin, Max Purcell, Chris O'Connell and Aleksandar Vukic all skipped qualifying due to their rankings.
World No.1 Carlos Alcaraz will make his Shanghai debut later in the week, while defending champion from 2019 Daniil Medvedev, Holger Rune, Casper Ruud, Jannik Sinner and Stefanos Tsitsipas are also among the field.
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