The centre-back recently agreed a 12-month extension to stay at Stamford Bridge, but he is hopeful that it will not be the last deal that he signs.
"Things change. Players get older and move on. One day it is going to be me. I'm certainly going to be giving my all to make sure it is not at the end of this season," the 33-year-old told Chelsea TV.
"It's an important year for me. Obviously I got a year's contract and it's dependable on how I do again this year, so it's on me and I quite like that pressure. Hopefully we can go again."