Klopp has said that due to Robertson not defending brilliantly when he was at Hull City, no club other than Liverpool wanted to secure the services of the left-back.
The Liverpool boss has also stated that only the Reds were interested in landing 28-year-old central defender Matip on a free transfer in the summer of 2016.
Klopp told beIN Sports: “(Andy) Robertson was sensational attacking but nobody wanted him because defending was not good.
“Now you see him now, you can learn defending. Joel Matip on a free transfer, nobody wanted him really. But you need to make good decisions because the other teams don't sleep.”
Robertson was released by Celtic as a teenager, and the Scotland international left-back had to work hard to get to where he is now.
The former Dundee United star is one of the best left-backs in Europe, and the 25-year-old can still get better.
The left-back has improved defensively, and in terms of attack, he is among the best full-backs in the world.
As for Matip, although many will still have doubts over him, it cannot be ignored that Liverpool signed a very capable central defender on a free transfer.
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