Ramos is in line to make a long-awaited debut for Paris Saint Germain in Sunday’s Ligue 1 encounter at Saint Etienne.
The 35-year-old moved to the French capital in the summer on a free transfer after leaving Real Madrid but has been struggling with his fitness.
Ramos was named on the substitutes’ bench for PSG’s UEFA Champions League clash with Manchester City on Wednesday.
As he prepares to play his first game since turning out for Real Madrid against Chelsea in early May, Ramos is adamant he still has a lot to give to his new club.
"I think I can continue playing for four or five years," Ramos told Amazon Prime Video in an interview that will be broadcast in full on Sunday.
"The most important thing is that my head holds. I hope I don't have any more physical problems."
"I believed in myself and in work," he continued. "I focus on giving the club back the trust it has placed in me. I hope to reach my best level.
"At the end are difficult moments, moments of loneliness. Whole hours in the gym with the physiotherapist, with the physical trainer. You constantly have negative thoughts that sometimes make you doubt."
