Robertson impressed in the first-half as he put in some crucial tackles and interceptions to thwart Barcelona's frightening attack of Luis Suarez, Lionel Messi and Philippe Coutinho.
However, Robertson suffered a blow after being involved in a coming together with Suarez, with the Uruguayan flicking his leg out at the defender as he chased back.
Despite clearly struggling with a knock, he managed to carry on until half-time, when manager Jurgen Klopp chose to replace him with Gini Wijnaldum - who went on to change the tie for Liverpool.
Robertson confirmed he would have a scan on a suspected calf injury on Wednesday morning as he hopes to be in contention for Liverpool's final Premier League game against Wolves on Sunday and the Champions League final on 1 June.
“It doesn’t feel the best at the minute but I’ll get a scan tomorrow,” he said following the full-time whistle at Anfield.
“They’re confident that it’s just a nerve or whatever and it can be maybe a couple of days, but we’ll wait and see.
“We can’t really comment until I get the scan, but I’ll be saying my prayers tonight.”
When asked about his clash with Suarez after the game, Robertson told BT Sport: “Who’s going to the final? We’re going to the final so that’s all that matters.
“Honestly, I don’t care just now. Fingers crossed I’ll be okay.
“This team is incredible, seriously. I’ve said it so many times this season, but my god, what a team.
“We believe. People wrote us off. But we believed if we got off to a good start we could do it.
“Alisson has pulled off some unbelievable saves. Fingers crossed. We go to Sunday full of energy. It’s out of our hands but we’ve seen stranger things happen. Especially tonight.”
Divock Origi scored the opener for Liverpool inside the first ten minutes, before Wijnaldum struck twice in two minutes to even things out on aggregate.
Origi, who also scored the winner against Newcastle on Saturday, then went on to net the crucial fourth goal after Trent Alexander-Arnold's surprise corner routine.
The Reds are still in with a shout of winning the Premier League, albeit whilst relying on Brighton to do them a huge favour against Manchester City on the final day of the season.