'You have to give yourself the chance to make the step,' said the 27-year-old - who is yet to score for Chelsea since his £50million switch.
'If you are lucky, then your club will help you, this is what happened at Atletico Madrid [when I left for Liverpool]. I knew people at Atletico and had good personal relations. But at Liverpool there were problems.
'Javier Mascherano did many good things for Liverpool but they did not treat him well when he left.
'It is a complicated situation when you leave a club but footballers always want to move forward, chase what he believes is better, because we only have eight or 10 good years.'