Robertson combined with the 20-year-old to contribute a remarkable 29 assists to the Reds last season, helping the club win their sixth Champions League trophy.
"Trent was outstanding all last season but he took it to another level at the end of it and became the best right-back in the world," he told the Telegraph. "He almost became our main man in the last 10 games of the season.
"What was it [last season]? Mid to high-20s contributing goals [between us]? It is going to be hard to replicate it, but if we get close it helps the team.
"But the clean sheets were as important for us. As a pair, I felt our Champions League final performance was as mature a performance as we put in. Once we had the lead we were thinking, 'clean sheet and we win the game', and we did that.
"Near the back end of the season we noticed the emphasis on trying to stop me and Trent doing what we try to do. It is up to us to adapt to that, but if someone is dedicating time to try and stop me and Trent, that is going to create a lot of space for other players.
"The quality we have got shows it is very difficult for anyone to focus on just one or two players. Someone else will pop up."