Liverpool's injury crisis went from bad to worse on Tuesday as Trent Alexander-Arnold was ruled out for up to a month with minor ligament damage to his knee.The 20-year-old sustained his injury during the warm-up before Saturday's game against Brighton, which Liverpool won 1-0.He braved the full 90 minutes at the American Express Community Stadium, but tests have since revealed the extent of his knee injury.Jurgen Klopp was made aware of Alexander-Arnold's knee prior to the game but played him anyway after the right-back said he should be OK. Turns out he wasn't."It was the last situation in the warm-up, I think he stepped on the ball," said Klopp on Sunday. "I didn't see the situation, I only saw him going down."Immediately [you see] Trent on the ground, he's a hard boy so that's not a good sign. Then the [doctor] came and [said it was] something with the ankle."It was pretty painful. He made the sprints but I didn't like the way he made them because when he slowed down, I thought it looked a bit like limping so I thought it didn't look good."On the way to the dressing room he told me the pain was away, had gone, then the [doctor] made a little treatment."Then he said pain-wise it's good now and should be OK, made a strapping [for it] and [he could] go out. I hope it will not take long until he doesn't feel it anymore."Alexander-Arnold becomes the latest Liverpool defender to join their long injury list, with Dejan Lovren and Joe Gomez also currently unavailable.But is Klopp panicking? Of course not.Liverpool are short of right-back options following Nathaniel Clyne's loan move to Bournemouth, but the Mirror's David Maddock has explained why Klopp isn't phased.

"Klopp not panicking over Trent AA injury - likely to miss only 3 games," wrote Maddock, who is well known amongst Kopites.

"Manager let Clyne go because he wants [James Milner] influence in his dressing room and in team if possible... and back up full back (on both sides) offers opportunity. Gomez back next week too."

Makes sense. Klopp may not have Clyne at his disposal anymore, but Milner is a perfectly capable right-back and Gomez is close to returning, so there's nothing to worry about for Liverpool fans.