He told liverpoolfc.tv: "I've found our partnership very good and I think we have done well together.
"Charlie has played in England for a few years now so he didn't need to adapt too much.
"It will still take him a little bit of time to settle in the team but he is a good person who works really hard.
"Charlie is a player who has an offensive mentality and likes to get forward and give the last pass and of course he is very dangerous from set-piece areas and has already provided a few assists this season.
"With him being more attack-minded and Stevie and Jordan (Henderson), who are able to play in the middle as well, also offensive players, my job is to cover them and try to be in a good position to give the back four a bit of security."