Returning to the pool on day five, Oleksiak again had a record breaking qualifier followed by a relay medal. She broke the world junior record of the 100 m freestyle with 52.72, the second fastest time of the qualifying heats, and anchored the 4×200 m freestyle relay, again winning the bronze (along with Katerine Savard, Taylor Ruck, and Brittany MacLean). Oleksiak's leg time of 1:54.94 was the 4th fastest in the field after the three medalists of the 200 m freestyle.