But former Liverpool boss Benitez said: "It is good for me because before I didn't have to think about which striker to choose. I prefer to be in a position where I can choose one or the other.
"It's important to have options, especially if you have two games in four days. We have different options.
"I have an idea who will start. It depends on how they feel and perform. There's no rule about one playing in this game and the other in the next. I've spoken to Fernando a lot and with Demba and they know what I am expecting of them.
"We have now two good players, two good options, and both will compete. I can see everything positive in terms of the team now.
"Talking with Demba and Fernando, they both know they have to compete and play well. It can bring the best out of both of them."