Chelsea striker Samuel Eto'o believes his side are capable of winning the quadruple this season.
The 32-year-old, who signed for Chelsea on a free transfer in the summer, believes Jose Mourinho's side can win the Premier League, Champions League and both domestic cup competitions.
Chelsea have won eight of their last nine games and guaranteed their place in the Capital One Cup quarter-finals on Tuesday by beating Arsenal 2-0 at the Emirates Stadium.
The Blues are currently two points behind Premier League leaders Arsenal and are top of their Champions League group, having won two games out of their first three encounters.
Eto'o, who won the treble with Inter Milan under Mourinho, believes his side are capable of winning all four trophies this season.
"It's going to be difficult, yes," Eto'o told The Sun. "But we've got a good team and will not sacrifice our chances of winning one competition in preference for another.
"We're trying to win every competition and we will get there. We have as much chance as any rival.
"There's a lot of confidence in this group but we must stay focused. I realise each and every team can win. Until the referee blows that final whistle, even if you're winning 4-0, the other team is capable of coming back and even getting a fifth goal.
"We'll keep positive but still be a little suspicious as too much confidence can leave doors open for mistakes."
The Cameroonian has had a disappointing start to the season - having scored just one goal in nine games for the Blues since his move to Stamford Bridge at the end of August.
Despite the striker's slow start to the season, Eto'o believes he is settling into life at Stamford Bridge.
He added: "I've adapted to life here very well, even if I would have liked to be playing my best football much quicker.
"At my best I'll be able to bring something valuable to my team-mates, the club and the fans."