Jimenez started at fullback as Real won 2-0 at Valencia.
He later told Real Madrid TV: "We are very happy to take home the three points. We knew how challenging today's match was. I want to thank the coach and the entire technical staff for their trust, and especially my teammates for making me feel like one of them.
"(Coach Alvaro Arbeloa told me) to play as if I were playing with Castilla. Besides, being surrounded by the best players in the world makes everything much easier."
On his senior teammates, Jimenez also said: "In every training session I do with them, I try to observe because they are the best in the world in their position.
"I want to thank both Trent (Alexander-Arnold), (Dani) Carvajal, and (Federico) Valverde because they have been very generous with me and have given me all the advice. I felt super comfortable. This is another jersey that I will frame in my room."