After a hard first half at the Amex that saw the Reds dominate possession but not trouble goalkeeper David Button, their fortunes changed after the break.
Brighton's players and fans reacted angrily to Salah winning the penalty under Pascal Gross' heavy challenge, but Robertson has mounted a strong defence of his Anfield team-mate.
Liverpool ended the game having registered just three shots on target, but speaking at his post-match press conference, Klopp was delighted with his side's close-fought victory.
"It was not too easy as 1-0 is not a massive result and it gives the opposition an opportunity to strike back". We knew it was really hard to take all three points here. We won it and I'm absolutely happy about that.
"So there will be games over the season and whoever does that will probably have three or four games to look back on and if we manage to do it, I'm sure we'll look back on this game as one of them".
"The scoring momentum we didn't have today".
"We played a lot of times against a 4-5-1, it's really hard".
"I can't believe that a manager who's going in on a big game - I don't know Liverpool's next big game - but who goes into a big game will not remind coaches, or won't say publicly, I'm a little concerned how easily Mo Salah is going to ground these days - particularly in the penalty area".
Klopp also praised his players for how they avoided handing Brighton opportunities from set-pieces, saying "this kind of concentration level is hard to keep; the boys did it".