LONDON — They introduced Justin Gatlin to the Olympic Stadium crowd here Sunday evening, just before they put a gold medal around his neck, before The Star-Spangled Banner played in his honor, and along with some cheers a chorus of boos rang out.

The cheers — great. The boos — this fell somewhere between disappointing and reprehensible. Olympic-style sport is not the English Premier League, the NFL or NBA. It is supposed to be about promoting three key values: friendship, excellence and respect.

Saturday’s men’s 100-meter final immediately became arguably the biggest gold-medal victory in the history of the event. Gatlin defeated the sport’s biggest legend, Jamaica’s Usain Bolt. It’s how the race will forever be remembered: who beat Bolt, and in Bolt’s last individual 100? Gatlin. And who, before Saturday, was the last guy ever to beat Bolt? Gatlin, in Rome in 2013.