LONDON — This time, he wasn’t looking around with where-are-all-those-chumps? disdain as he crossed the finish line. This time, they made him work for it.

Didn’t matter. It was the same result in the men’s 100-meter final on Sunday night as it was four years ago in Beijing. Usain Bolt is still the Heavyweight King of Sprinting, the unquestioned World’s Fastest Man.