The 24-year-old made a deadline-day switch from Chelsea to spend the season at Anfield and adds to Rodgers' growing attacking options.
Rodgers said: "In terms of this summer, it was probably unexpected for him.
"He's a player that has got experience - he's 24 years of age and became available for us.
"It's a unique opportunity for him; he's leaving a very good club, that has been successful, and he's coming to one of the biggest clubs in the world.
"There are not many players that get a chance to do that. He's coming here to prove himself."
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