Sergio Aguero believes Manchester City are the only team capable of preventing themselves from retaining the Premier League title this season.
Pep Guardiola's side won the title with a record number of points, goals and wins last season, and they are on course to replicate that this season, having dropped only four points from their first 12 matches.
"I think the Premier League is going to be more complicated this season than last," Aguero admitted, quoted by the Mirror.
"I think Liverpool and Chelsea are our main threats, without forgetting Arsenal, as they have been playing really well recently.
"It’s very difficult to win the Premier League again, but I think we have a good team. We are on top of the table and we have the desire to achieve that [back-to-back titles].
"At the end of the day, it’s going to depend on us. If we keep playing well and getting three points after three points, what the rest of the teams do is not going to matter. But I think it’s going to be tight until the end of the season."
No team has retained the Premier League title since Manchester United won it three times in a row between 2007 and 2009. City have won three of the nine titles since then. They visit West Ham on Saturday looking to extend their winning run to eight in all competitions.