"We have a good team, we have a big squad - we are the champions," he told Sky Sports News.
"We have a lot of young players in the team and over the last two years they have improved a lot, which is important for the team and the club.
"I believe we are strong enough to compete for all trophies - one or two more signings would be good for the team but things are good.
"Cesc (Fabregas) is a good player but it's not up to me to say who we need or not - any player who comes here will be accepted, just as I was when I came here.
"But it's not something we think of much - we just try to focus on our game and to help the manager achieve what we really want. That's our aim."