World-leading performances, surprise breakthroughs and even a major upset highlighted the final day of the USA track and field championships on Sunday in Sacramento.
Dalilah Muhammad led a scintillating 400-meter hurdles competition, Ryan Crouser and Joe Kovacs threw haymakers at each other in a crowd-pleasing shot put and collegiate star Daejah Stevens upset world leader Tori Bowie in the women's 200.
Muhammad led three runners under 53 seconds for the first time, and six under 54 for the first time, sprinting to a personal-best and world-leading time of 52.64, ahead of Shamier Little (52.75) and Kori Carter (52.