The Liverpool boss has been discussing the defender.
Flanagan has suffered from injury problems for years but now no longer requires special rest during training, which Klopp is delighted by.
And the Liverpool boss has given an encouraging update on the 23-year-old.
The German is quoted as saying by the Liverpool site: "Of course in the past it was a difficult situation for Flanno because of injury but now it is a good moment and life can go on and [the] sun shines again, things like this.
"[It's] a really good moment for him, very important, and now he can start getting fit because he of course cannot be at 100 per cent. It's completely normal.
"His break was too long but lately from the pre-season on, he's then maybe the old one - what he was before his injury. In this moment everything is OK, he makes all the sessions. No rest, no special rest for him - really good."
As popular as Flanagan is at Anfield, he still has a long way to go.
The full-back was lauded for his comeback to fitness - and rewarded with the Liverpool captaincy against Southampton - but some were quick to point out that he was far from invulnerable defensively as the Saints scored three second-half goals.
Flanagan is brave, heroic and lives for Liverpool. But the primary job of any defender is to defend - and make sure they are positionally sound.