A wagging finger. A stunning swim. And with that, a win for clean athletes everywhere in an Olympics where no one is sure the playing field is really level.

King had already "stirred it up", in her own words, in the build-up to the race by wagging her finger at the "cheating" Russian.

Russian swimmer Yulia Efimova is likely to find out on Tuesday whether she will be able to compete in the Rio Olympics after her appeal to the Court of Arbitration for Sport (CAS) was adjourned.