Defending Olympic champion Brimin Kipruto tripped with just 700m remaining and was sent crashing to the track.
Kipruto jumped straight back up and sprinted to get back into the pack, but the damage was done and it was his fellow Kenyan and world champion Kemboi who produced the decisive finishing burst to claim gold.
France's Mahiedine Mekhissi-Benabbad took silver and Kenya's Abel Mutai the bronze, while the unfortunate Kipruto had to settle for fifth.
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