Serem clocked 8:06.90, stunning El Bakkali, whose homestretch surge has been his trademark.
Kenyans lost the steeplechase title at the Tokyo Olympics with Morocco’s El Bakkali winning gold.
He says more steeplechase legends should be brought on board to help prepare teams for top global contests such as the Olympic Games and World Championships.
Chebet clocked 28min 54.14sec at the Prefontaine Classic Diamond League.
The Commonwealth champion clocked 14:26.98.
World Cross Country Championships finalist Charles Rotich came third.
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