Thanks for this video. On review: Rudisha needs technical advise. He made serious blunders. Clearly he was unaware of the Botswanan opponent. He realized too late. He then took no evasive maneuvers.
Secondly, the Botswanan had his plan ready before the match. He therefore shadowed Rudisha from start. Rudisha let him. That is the Ethiopian dirty tactic. Rudisha could have let him go ahead so that he could then overtake him. Instead the Botswanan stressed him.
I did not see any fight back from Rudisha. In fact he appears to slow down and give up. The distance at which point the Botswanan made his bid was enough for a fight back. Had he speeded or blocked him ( within sportsman standards where those in front have the right of way) he could have contained him.
Rudisha still has the power but he does not know where and when to apply. I can't dismiss him just yet.