The manager has claimed that he was initially ready to talk to Delph regarding his future at the club, but his performances in training convinced him otherwise.
Benitez admitted: "To be fair I don't know how long [Delph will be out for].
"But what I can tell you is he's desperate to come back, he was training really well.
"He was one of the players that we were thinking about his future, but the way that he was training - we were happy.
"It was a big problem for us in the end because he could be an option. I don't say that he could play too many games, but the way that he was training and his experience made him an option.
"Now we have to wait, I don't know how long, but it's two or three weeks minimum. We have the international break, so that is good."
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