Mighty Johannes Thingnes Bö won a dramatic three-man sprint to the finish line to give top favourites Norway Olympic gold in the biathlon mixed relay on Saturday – but was then not allowed to properly celebrate with his team-mates. Bö is considered a close contact to a person who has contracted the coronavirus at the Beijing Games and must even socially distance in moments of joy such as the photos of the medallist. But he was close to Russian Eduard Latypov and Quentin Fillon Maillet of France when he roared from the back of the trio to first on the home straight, having made up a nine-second…