Branislav Ivanovic has hailed the arrival of Chelsea new boys Eden Hazard and Oscar.
Ivanovic declared their squad was already strong enough to challenge on all fronts this season.
He said: "We have enough players and quality to cope with all competitions. With hard work, we can make it."
He added: "Do the new players excite everyone? Yes, of course.
"You have to have a big and good enough squad and that is what we have.
"The new players are great. During the pre-season, they have shown they have fantastic quality and we have changed a lot as a team because all of them are so creative.
"They have given us the pace we needed. They are great players and every team needs this kind of quality.
"Eden had a great performance against Wigan and is the type of player we needed in the team. Oscar is great too.
"He has a great view of the game. He is young also and we get something special from him in the creativity department.
"If we want to win, we have to be at the top level in every game and win the difficult games."