The holders claimed top spot in Group E and their place in the first knockout round with an authoritative 2-0 win at Salzburg on Tuesday.
A two-legged tie with Real Madrid, Atalanta, Atletico Madrid, Borussia Dortmund or Lyon now awaits the Reds.
And Robertson thinks a record of reaching back-to-back finals in Europe’s premier club competition makes Jürgen Klopp’s side a fearsome prospect for any possible opponent.
“We respect every opponent we play but we know the way we have done things in the last two years and nobody wants to play against us and that is clear - but it is up to us to keep proving that,” Liverpool’s left-back said, after the victory at Red Bull Arena.