London - Chelsea have a squad brimming with world-class players but it is the tactical astuteness of manager Jose Mourinho that has given them a clear edge in the Premier League title race.
Mourinho's side opened up a 10-point gap at the top of the table with a 1-0 win over a rejuvenated Manchester United on Saturday built on steely defensive resolve and lethal counter-attacking highlighted by Eden Hazard's goal.
It was a vastly improved United side who arrived in west London on a six-match winning run in the league but they were blunted by Mourinho's tactical nous.