US basketball star Brittney Griner has appealed against her nine-year prison sentence in Russia for drug possession. The two-time Olympic gold medalist was convicted in August after vape canisters containing cannabis oil were allegedly found in her luggage at Moscow’s Sheremetyevo Airport. A regional court in Moscow began hearing Griner’s appeal on Tuesday. The 32-year-old is appearing via video call from a detention centre near Moscow. Her arrest in February came amid heightened tensions between Moscow and Washington, just days before Russia invaded Ukraine. The US has said the case is politi…