Manchester City take on Real Madrid in the first leg of their Champions League quarter-final clash – and there is something Pep Guardiola reckons will be ‘almost impossible’ for his players to do. City flew to Madrid last night, ready for the first of two huge games against the Spanish heavyweights. Real Madrid are looking for revenge, after City put them out at the semi-final stage of the competition last season. This time around they have England superstar Jude Bellingham, and the feeling is that it could be a much closer affair. City are missing key players. Kyle Walker – so often the best …