At the gun, world record holder Genzebe Dibaba started more aggressively, showing her intent to mark the leader, who turned out to be Beatrice Chepkoech.
After a lap of easy jogging, Rababe Arafi moved out to a faster pace, immediately marked by Dibaba.
Hassan, Muir, Chepkoech, Arafi and Winny Chebet formed a chase pack that separated from the rest of the field.
Over two faster laps, Chepkoech moved past Hassan to mark Dibaba as the three broke away from the other three, with Muir looking like she was struggling to hold on to the back of the second group.
Chepkoech struggled and fell off the back leaving a three woman breakaway, with Dibaba leading Hassan then Muir with two laps to go.