The Brazil goalkeeper was recalled by the club last month but little has been spoken about his future.
And, if Cesar has any hopes of winning his place back, he may have been discouraged by Green's latest comments.
"I've got a long time left hopefully," the shot stopper told Goal.com. "I'm 34 now and if I play with this it’ll take me to 37, so [I'm] getting there, but I’m happy at QPR. [I'm] happy playing the game and enjoy being at the club.
"You never say never but, if you told me I’m going to play the rest of my career at QPR, I’d be delighted."
By comparison, the situation surrounding Cesar is shrouded in mystery. A move away from west London would make perfect sense but the Brazilian's wages appeared to have discouraged potential suitors in the past.
But playing for QPR also came with its complications last season, with the 34-year-old revealing this summer that he could not take part in games due to contractual problems.
Why, then, did the Rs recall Cesar from his Toronto loan - to sell him permanently or use him as competition for Green in the Premier League?
Interestingly, Cesar's Brazil future has been the subject of recent speculation, too, with new coach Dunga reportedly blacklisting the goalkeeper. Dunga denied the claims but reports had surfaced that Cesar and Fred have fallen out of favour within the national setup.
While the grass looks Green for Rob, if you'll pardon the pun, the future is somewhat less clear for Cesar.