If you saw the race, Mo actually stumbled badly coming out of the blocks and had the world's worst start.
He was in the next lane to Chambers who got a flyer and Mo spent the next 99 metres trying to catch up, but Chambers had his ears back and that metre at the start was a dream beginning for him, no way he was going to be caught.
Chambers could even drop his arms by 95 m and begin the bad-ass posturing well before the line.
Maybe Greene does need to re-focus a bit, or maybe it is the beginning of the "baton-change" that must happen eventually. Whatever, he did not have a good start and not even he can give away anything at this level any more.
He'll come back.