The interim manager has told owner Roman Abramovich that his squad is not strong enough to cope with the demands placed on them this season.
But he appears to have given up hope of being allowed to add to the January signing of Demba Ba before Thursday's transfer deadline.
Asked if he anticipated any dealings before the window closes, he said: "I don't think so but my job is to improve my squad and manage the situation we have.
"We are playing more games than anyone. In some positions we have only two or three players, that's the reality.
"After the Africa Cup of Nations, and when we get Eden Hazard back, we'll be able to manager a bit better.
"I'm really focused on my job. We know we are training well and preparing properly, and that's my job.
"The players are happy in terms of what we are doing. Against Arsenal we were fantastic. We have to win together.
"My focus is to improve the team and keep the players believing that we can win. I like managing top sides and this is one.
"The positive is that we are still scoring goals and conceding less than in the past, but we still need to improve."
"My position is exactly the same," Benitez said, confirming he had held talks with club technical director Michael Emenalo after Sunday's FA Cup tie at Brentford.
"I was speaking about football with Michael, as normal. I will try to do my job as well as I can, and try to do my best every game."