Luis Diaz made his Liverpool debut on Sunday, providing a brilliant assist for Taki Minamino's goal.
However, the Colombian suffered a knock to his knee as Cardiff defender Aden Flint landed on him after an aerial challenge.
Jurgen Klopp is confident the knock is not serious.
"Good, thank God!" Jurgen Klopp told the press after the Cardiff game when asked to provide an update on the forward "It was a scary moment, that’s true.
"The goal he set up for Taki was absolutely incredible: high press, counter-press, I love it, and then Taki finished it off.
"Then, the long ball, the heading challenge, he goes down [and] holds his knee afterwards. We were all really shocked.
"I had a look on the screen and I saw that everything was fine in the air, everything was fine when he came down, but then I saw the big fella of Cardiff standing on his knee and he has now a bruise there and a scar, it’s red and a little bit open.
"We all said to him, ‘Welcome to England!’ Now he has his first assist and his first little scar. That’s absolutely OK.
"I don’t think it will be any more serious – maybe tomorrow he feels it more and we have to react to that, but it’s nothing serious."
