Korstanje (NED), Ribeiro (POR) & Miladinov (BUL) All Notch 50 Fly National Marks

The Netherlands' Nyls Korstanje led a trio of record-breaking performers during tonight's semi-final of the men's 50m butterfly.

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Portugal ,Bulgaria ,Netherlands ,Bulgarian ,Dutch ,Maxime Grousset ,Diogo Matos Ribeiro ,Nyls Korstanje ,Josif Miladinov ,Diogo Ribeiro , ,Ben Proud ,Matos Ribeiro ,