That’s according to a man who filled that particular role with distinction throughout his own seven-year Liverpool career - John Arne Riise.
Robertson and Moreno have shared left-back duties for the Reds this season, with the former having established himself in recent months after the latter sustained an ankle injury in the 7-0 win over Spartak Moscow in December.
Both players have performed strongly when called on in 2017-18, and Riise sees the duo as each providing Klopp with an excellent option.
“I’ve been very impressed. He’s young, aggressive and fit,” the 2005 Champions League-winner told Liverpoolfc.