Drama at Chelsea FC: Mudryk tests positive in doping test and could be banned for four years - Chelsea top Champions League group with perfect record thanks to Catarina Macario double - Chelsea's Mykhailo Mudryk vows to prove innocence after positive test - Man Utd snatch win at death as City hits rock bottom, Chelsea fly - Marc Cucurella masters 'three positions' to inspire Chelsea's title charge - Five reasons why Chelsea can win the Premier League - Maresca: Chelsea must learn to see out games - United win Manchester derby, Chelsea close gap with Liverpool - Marc Cucurella masters 'three positions' to inspire Chelsea's title charge - Ranking Liverpool's rivals for the Premier League title: Chelsea impress, Manchester City out of the race?