Robertson has been phenomenal all season and is a guaranteed starter, if fit, but the Scottish global has to be used wisely when the games come thick and fast over the coming months, and it's the left-back area that could see Liverpool's vulnerability exploited, if they don't delve into the transfer market.
Dejan Lovren became the latest Liverpool centre-back to pick up an injury when he came off after five minutes of the third-round tie, clutching his left hamstring.
"Joel trained yesterday first time with the team, which is really good, but we have to see", Klopp told a news conference on Friday. Adam [Lallana] is out.
Matip is making progress in his recovery and, like Lovren, could be back to face Crystal Palace next weekend.
They scored 22 goals in December but their defensive record was arguably more impressive as Liverpool's back line conceded just three goals.
Dalglish was replaced as manager in 2012 despite beating Cardiff City on penalties in the League Cup final, which incidentally was the last time the club have triumphed in a cup competition. "That's my preferred rhythm, to be honest". We could have done better but I am fine because the target is to win here.