His side may have cantered to the Premier League title this season, but Jose Mourinho is experienced enough to know that Chelsea will need to improve even further to have a chance of retaining their crown next season. Past seasons have proved that winning the league may be difficult, but doing it in consecutive seasons is an even bigger challenge. Only United and Chelsea have done since the Premier League began in 1992.
The Blues have only lost 3 games in all competitions this season, and only twice in the league. Despite not being at their best since since the turn of the year, they are on a 16-match unbeaten run and have picked up 38 points from a possible 48 in this period.