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Jurgen Klopp continues to believe the treatment of Alberto Moreno has been unfair - even as he hailed the Champions League debut of his replacement as “special”.

Moreno has made just one appearance since he suffered an injury against Spartak Moscow in the Champions League at Anfield.

The interim has seen Andy Roberston grasp his opportunity at left back, culminating in a Champions league debut in the rout of Porto on Wednesday night.

Moreno had managed to keep Robertson at bay for most of the start of the season and Klopp believes the Spaniard had shown his quality in his performances other than another poor showing against Sevilla.

(Image: John Powell/Liverpool FC via Getty Images)

Speaking from the Marbella training camp which Liverpool will leave today, Klopp said both full backs would be needed going forward.

“The way people talk about Alberto Moreno, I hope it has settled a little bit but it was never fair, that’s just how it is,” he told Liverpool.com.

“If you see Alberto Moreno training, there’s nobody in the squad has a shadow of a doubt about him quality-wise.

“He’s an unbelievably strong player and he didn’t deliver all the time, that’s true, but at the beginning of the season he was so strong for us.

“There was one game where he dropped and everybody was saying it was exactly like it was before.

(Image: John Powell/Liverpool FC via Getty Images)

“Obviously, life as a football player is not always fair, but in that time if we would have played Robbo instead of him - no chance to convince anybody, he was not ready for that.”

Klopp said Robertson had used the time waiting for his chance well to adapt to his new club and was now showing the benefits of that patience.

“We are already convinced when we sign the player; ‘Come in, we want you to make us stronger, if immediately, good, if not, then we have to work for it’.

“That’s why we have more than 11 players and, thank God, in the moment Alberto got the injury, Robbo stepped up. It was lucky to be honest, it was exactly the right timing.

(Image: John Powell/Liverpool FC via Getty Images)

“Now Alberto has to fight, no doubt about that, but we need two left-backs, we cannot go into the season with one.”

On Robertson’s performance in Porto, which he described as just “wow” he match, he added: “It was really good. The whole package, offensively and defensively, was really good. I would say it was his best game.

“We didn’t speak before the game about his debut, we handled it like business as usual, and he did really well.

“I saw him in the dressing room before the game deep breathing - it’s special, it’s really special.”