In his first event, the 4 × 100-meter freestyle relay, Magnussen was the lead-off swimmer for the Aussie team and jolted his team ahead of the field with a time of 47.49.
In his first event, the 4 × 100-meter freestyle relay, Magnussen won gold with Matthew Targett, Matthew Abood, and Eamon Sullivan. As the lead-off swimmer, he had a with a time of 47.49.