Chelsea boss Jose Mourinho says this season's Premiership will be the most competitive since he arrived in England.
"I'm convinced Chelsea will be a very strong team and we don't have to have fear about taking on any opponent.
"But the champions will be from this group of five teams. There are more rivals than just Manchester.
"At Liverpool there has been a big investment in three important attacking players.
"Arsenal have a young, high-quality squad. And there's Tottenham, who have the potential to fight for the title after investment without losing their most important players - starting with Dimitar Berbatov. Because of that we are in a very strong league."
