He told the club's official website: "Luis gives me angles to play in and for me it's about getting assists as well as scoring. It's about the team winning games. If someone's in a better position, you put them in and allow them to score the goal.
"It's great to have Luis back. He gives us options and he's one of the best forwards in the league. We form a good partnership.
"We miss Philippe Coutinho with his injury, but we've got some great players in this team and I'm happy to be playing with such world-class players."
Liverpool moved up to second in the Premier League with the victory over the Black Cats.