The Latest on Russia's appeal against the Olympic ban on its track and field athletes (all times local to Rio de Janeiro):
5:50 a.m.
Russian athletes are waiting nervously for news of whether their country's track and field team will be allowed to compete at next month's Olympics in Rio de Janeiro.
Athletes from a variety of sports including track and field were gathered at a sponsor's event in Moscow ahead of a ruling, while outside the capital preparations were under way for a Russian domestic track and field championship featuring potential Olympic contenders.
The Court of Arbitration for Sport is due to rule on Russia's appeal against a ban placed on its entire track and field team by the International Association of Athletics Federations following repeated allegations of mass doping and state-sponsored cover-ups.