During the summer, Caballero had a number of options after leaving Manchester City, but the experienced stopper decided to make the switch to the Blues to act as understudy to Courtois.
Caballero has only made 11 appearances in all competitions, but the Argentine has said that he remains highly motivated to earn a regular spot in the starting lineup.
"Some keepers find this position uncomfortable, but I have been working really hard to achieve the level of this kind of keeper, and I feel stronger and better today.
"If I just went to training and passed the days and weeks, this kind of easy position is not good for me. I have always fought to play and I try to do that with Thibaut every single day, and for this I have achieved a lot of good performance in the last few years."
Caballero is expected to start when Chelsea face Southampton in the FA Cup semi-finals on Sunday afternoon.