How Russia could challenge Olympic bans at CAS and beyond

Much of the intense Olympic action before the Rio de Janeiro Games open in less than two weeks is set to play out in the law courts.

For many Russian athletes caught up in a doping scandal, a legal fight — and a race against time to get the verdict they want — is their biggest barrier to competing.

The Court of Arbitration for Sport already handed one defeat to Russia on Thursday. It rejected an appeal by 67 Russian track and field athletes who the International Association of Athletics Federation had declared ineligible for Rio after previously banning their national federation from international competitions.

On Sunday, the International Olympic...