The early pace was steady with Cheruiyot reeling off the laps at around 71sec until Masai took over with four laps remaining.
With over a lap to go Cheruiyot regained the lead from the taller Masai with Ejigu slipping into third.
As the lap unfolded, the Ethiopian challenged for the lead but Cheruiyot responded, while Masai had to settle for third.