Chelsea were unable to cope last season when their biggest names were not in the side, but their 2011 recruitment drive has given them a squad that bears comparison with any since Roman Abramovich bought the club.
Ivanovic said: "For us, we play every game with three, four, five new, fresh players. This is important.
"At the beginning, it was very difficult to see how the changes were going but now it is okay.
"We have great options up front and it is important for all of the guys to be ready for the competitions and always show their best on the pitch to get the best results for the club.
"We started the season with everyone fresh and motivated. This is going to be the key for this season. The motivation is most important."