Klopp says Adrian was frozen (almost like Mel Gibson in Forever Young) but then why didn't Klopp ask him to warm up with the other players on the sidelines? This should be normal. You can't ask the reserve GK to warmup when you think your keeper will get a red card, it could happen any time. The reserve keeper should be running out there every time the other kids go out. If a keeper is sitting on the bench all season and gets at best a month of action, for the other months he should be earning his money by at least getting warm and running around just in case.