The Blues remained five points clear of Manchester City at the summit following last weeks narrow 1-0 victory over West Ham United at Upton Park.
Diego Costa has been banging in the goals for fun at one end while the likes of John Terry, Gary Cahill and Thibaut Courtois have been keeping them out at the other.
We’ve been combing through the statistics over the weekend to find out exactly why Mourinho’s men are top of the pile with a game in hand on their nearest rivals.
If you fancy yourself as a bit of an expert then try our tricky Chelsea Premier League quiz and see how much you know about the numbers behind the Blues’ title charge.
Statistics used in this quiz are accurate as of March 6, 2015.