Jose Mourinho's side started the season better than anyone else, and that ultimately helped them to reclaim the title.
The Blues secured the title with three games to spare, courtesy of a 1-0 win against Crystal Palace last time out, after having led the title race for the majority of the campaign.
That success was their first under Jose Mourinho since his return to Stamford Bridge, adding to the Capital One Cup victory secured earlier in the season, and Merson believes it was their start to the season that helped to put them on course for major honours.
“What I find that’s different to any other team is that they start the season like the first game of the season counts,” he said on Soccer Saturday.
“It’s not like ‘oh we can start slowly and we’ll catch it up later on’. They won the league after fifteen games, to be honest.”
Manager Jose Mourinho has proved to be astute in the transfer market since returning in the summer of 2013, with a number of his signings having proved to be key players this season.
While the fans would obviously like to see more 'world-class' talent heading into Stamford Bridge to boost the squad, the Portuguese boss has recently stated that there will not be a massive overhaul come the summer, according to the Standard, and Merson agrees with him.
The former Arsenal man has, however, highlighted where additions do need to be made.
“I don’t think they need a number of signings, but they do need a centre-half,” he added.
“John Terry has played every game and he’ll find out the older you get, you pick up injuries. Zouma is a good player but you need someone with experience. They definitely need a centre forward, a world-class centre forward, but everyone wants one.”