Olivia Wunsch’s 52.61 split on the Aussie 4x100 free relay at World Juniors was faster than every American at Worlds this year except for Kate Douglass.
The 16-year-old Zhang dropped five seconds in the 400 IM with a time of 4:12.44, winning silver at World Juniors and becoming the fastest 16 & under ever.
Team USA's Daniel Diehl, Maximus Williamson, Hudson Williams, and Jason Zhao set a new world junior record of 3:15.49 in the boys 4x100 freestyle relay.