Rank Lane Name Nationality Time Notes 1 4 Xu Jiayu China 52.44 Q 2 3 Ryosuke Irie Japan 53.02 Q 3 5 Grigory Tarasevich Russia 53.06 Q 4 6 Mitch Larkin Australia 53.19 Q 5 2 Corey Main New Zealand 53.76 Q 6 1 Shane Ryan Ireland 53.94 7 8 Javier Acevedo Canada 54.11 8 7 Matteo Milli Italy 54.44