Rodgers believes Sturridge could be one of the top scorers in the Premier League this season if he can maintain his fitness.
He said: "I think the biggest credit you can give him is that in all the time he was off, he never put on any weight whatsoever.
"His body fat remained the same as when he was playing, which shows you how hard he was working.
"And I have to give credit to the medical team, because they've got to make sacrifices as well. Daniel was keen to get himself right, so he was ready to fire at the beginning of the season.
"For a bit of time it was touch and go, but once we saw his progress and how he was working, he was back probably three weeks earlier than what we anticipated, purely because of his attitude.
"I always believe he's got a goal in him. That's why we took him here. As long as he's on the field, he can end up being one of the top goalscorers in this league."
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