George Russell crashed out of the Australian Grand Prix on the final lap, with his Mercedes flipping on its side. The Brit was attempting to chase down Fernando Alonso in sixth place but hit the barriers and had to retire from the race. It was a nightmare day for Mercedes, who earlier lost Lewis Hamilton due to engine failure early in the race. Russell had been involved in a big battle with Alonso and was closing in on the Spaniard in the final stages. But he lost control of his car at turn six and slammed into the barriers before flipping onto its side. The Briton reported over the Mercedes t…