The Reds sit in sixth place in the Premier League table and are four points off the qualification spots with just five games left to play. The full-back confessed it would be bitterly disappointing to miss out on the competition after being Premier League champions last term.
Robertson said: "This club is a Champions League team.
"We got to the quarter-finals this year – and we are still disappointed with that [defeat by Real Madrid] – and two finals in the space of as many years and won the Premier League comfortably last year, so to not have Champions League football next year would deflate the whole club, of course it would.
"This club is based on fighting to the end and that’s what we need to do."
Liverpool face a key clash against fierce rivals Manchester United today (02.05.21) but Robertson says it will be Liverpool's failure to beat teams in the bottom half of the table that will have cost them should they miss out on the top four.
He told reporters: "Even if we win the next five games it might still not be enough, but we need to put that pressure on the teams.
"There have just been too many games this season where we’ve dropped too many points. Against the bottom six, if you’ve only picked five points up at home then unfortunately you are going to fall short of your target."