Russia has won more gold at the Rio Olympics, but had its sole track and field athlete suspended from the games.
Russian long jumper Darya Klishina said she had proven she's a clean athlete many times and felt betrayed after the decision by track and field's governing body on August 13.
She's appealed the decision by the International Association of Athletics Federations (IAAF) to the Court of Arbitration for Sport, which expects a ruling before the Olympic long-jump competition starts on August 16.
The federation didn't say why Klishina was banned but she acknowledged that it's related to Russia's widespread doping scandal. Klishina, who has trained in the United States, was previously the only Russian allowed to compete in track and field.
Russian Sports Minister Vitaly Mutko called Klishina's ban a "provocation."
"Their target now is Russian sports," Mutko told the TASS news agency on August 14.
In related news, the World Anti-Doping Agency said Russia whistle-blower Yuliya Stepanova's account for the database that tracks athletes for drug testing has been hacked.
The agency said Stepanova's password was "illegally obtained, which allowed a perpetrator to access her account on ADAMS" -- the name for the database.
Stepanova, an 800-meter runner, and her husband provided evidence of widespread doping in Russian track and field.
At the games on August 13, Russia won its fourth fencing gold medal, beating Ukraine in the women’s team sabre event.
It was the seventh overall medal in fencing for the Russians, by far the most of any country.
Top-ranked fencer Sofia Velikaya went undefeated to lead the way.
The United States took the bronze in the event. The U.S. team included Muslim-American fencer Ibtihaj Muhammad, the first U.S. Olympian to wear a hijab during competition.
Iran won its second weightlifting gold on August 13. Iranian Sohrab Moradi topped the podium in the men's 94-kilogram category.
Moradi -- who previously served a two-year ban after testing positive for methadone -- dominated the event with a combined total of 403 kilograms.
Elsewhere, Uladzislau Hancharou of Belarus won the Olympic gold medal in the men's trampoline, topping defending Olympic champion Dong Dong of China.
Hancharou posted a score of 61.745 during his final set on August 13, the 20-year-old pumping his fist in triumph before finishing his dismount.
In boxing, Russia’s Yevgeny Tishchenko will take on Kazakhstan’s Vassiliy Levit for the heavyweight gold after both won their semifinal bouts on August 13. Tishchenko beat Rustam Tulaganov of Uzbekistan and Levit beat Cuba’s Erislandy Savon.
In other news, Olympic officials explained what caused the water at the swimming pools at the games to turn from blue to green -- an accidental dump of hydrogen peroxide.
A contractor added 80 liters of hydrogen peroxide to the diving and water-polo pools on August 5, but organizers only found out on August 9 when the water in the diving pool turned green from its typical blue during the women’s 10-meter platform final.
According to organizers, the addition of hydrogen peroxide neutralized the chlorine and allowed algae to bloom.
The green pools have become a huge headache for organizers of the Rio Games, becoming the butt of "swamp" jokes among the millions of spectators in the stands and watching in television.
Some athletes have complained about itchy eyes.
Officials said the pools will be refilled.