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Brittney Griner, an American basketball superstar and Olympic gold medalist, on Thursday learned her fate in a Russian court after she pleaded guilty to a drug charge last month.

A Russian judge convicted Griner of drug possession and drug smuggling and sentenced her to nine years in prison. She was also fined one million rubles, the equivalent of about $16,200.

Griner, 31, appeared in a courtroom in Khimki, just outside Moscow. She issued an apology ahead of her verdict and sentencing as prosecutors pushed for a 9.5-year sentence.

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"I want to apologize to my teammates, my club, my fans and the city of (Yekaterinburg) for my mistake that I made and the embarrassment that I brought on them," she said. "I want to also apologize to my parents, my siblings, the Phoenix Mercury organization back at home, the amazing women of the WNBA, and my amazing spouse back at home."

Griner contended she made "an honest mistake" when she brought vape cartridges containing oils derived from cannabis into a Moscow airport back in February, adding, "I hope in your ruling it does not end my life."

Griner was returning to her Russian basketball team, UMMC Ekaterinburg, after there was a pause in the season for international play. She called Yekaterinburg her "second home."

"I had no idea that the team, the cities, the fans, my teammates would make such a great impression on me over the 6 1/2 years that I spent here. I remember vividly coming out of the gym and all the little girls that were in the stands there waiting on me, and that’s what kept making me come back here," she said.

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Russian prosecutors argued Griner purposely packed the cannabis oil. Griner’s lawyers argued that Griner was using marijuana to treat pain, but Russian officials said the U.S. laws regarding the legality of the drug had no bearing on the Russian judicial system.

The U.S. State Department had classified Griner as "wrongfully detained." Secretary of State Antony Blinken revealed last week that the Biden administration offered a "substantial proposal" for the return of the basketball player and fellow American Paul Whelan.

Blinken said during a press conference that the Biden administration made the proposal weeks ago and is hoping to speak to Russian Foreign Minister Sergey Lavrov for the first time since Feb. 15. 

Russian media has speculated the trade could be for Viktor Bout, a Russian arms dealer known as the "Merchant of Death," who is serving a 25-year sentence in the U.S. after being convicted of conspiracy to kill U.S. citizens and providing aid to a terrorist organization.

White House press secretary Karine Jean-Pierre told reporters Monday that Russia made a "bad faith" response to the U.S. government’s offer. She did not elaborate.

Russian officials have made clear that no prisoner swap could happen until a conviction and sentence is handed down.

President Biden reacted to Russia’s sentencing.

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"Today, American citizen Brittney Griner received a prison sentence that is one more reminder of what the world already knew: Russia is wrongfully detaining Brittney. It’s unacceptable, and I call on Russia to release her immediately so she can be with her wife, loved ones, friends, and teammates. My administration will continue to work tirelessly and pursue every possible avenue to bring Brittney and Paul Whelan home safely as soon as possible," he said.

Fox News' Paulina Dedaj contributed to this report.