By Matthew Cooper Lewis Hamilton endured a nightmare Australian Grand Prix as he was forced to retire due to engine failure, with the seven-time Formula 1 World Champion “really struggling” with his car. Hamilton began the race in 11th after a lacklustre qualifying session and his engine ultimately gave up the ghost after less than 20 laps. And Sky Sports F1 pundit Martin Brundle was quick to point out how Hamilton had been having difficulties with his Mercedes for the entire race weekend. Before his engine failure, Sky commentator David Croft noted: “Lewis Hamilton, heading down towards turn …