The reigning world and European champions bowed out of Brazil 2014 with a comfortable 3-0 win over Australia on Monday, as Netherlands and Chile progressed ahead of them into the knockout phase.
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Juanfran, however, believes the 63-year-old will continue in the role as the country look to bounce back from their disappointing campaign this summer.
"We'll respect his decision, I hope he continues with the team because nobody is better than him," he told reporters.
"I think Del Bosque wants to continue, that the intention I see in him.
"I'm very grateful for the chance to be here, the coach has trusted in me all the time and I think all of us have to thank our coach for all the things he has done for us and will do in the future."
Xavi, Xabi Alonso and David Villa are three of Spain's veteran stars who could well have played their final games for the senior side, and while Juanfran admits he does not wish to see them retire, he is confident the team will not require wholesale changes going into the Euro 2016 qualifiers.
"I wish they would stay, I have told them that," he added.
"Revolutions are things of the past, the coach will make the necessary changes step by step and all of us will try to help Spain be the best of them all."