Liverpool goalkeeper Loris Karius has undergone a scan in the United States with the Reds concerned he suffered a head trauma during the Champions League final defeat to Real Madrid.

Karius was decked by a flailing elbow from Real Madrid skipper Sergio Ramos in an off-the-ball incident inside the penalty area during the match in Kiev's NSC Olimpiyskiy Stadium on May 26.

The incident, which was not seen by referee Milorad Mazic and his assistants, came shortly before Karius gifted Karim Benzema the opening goal with a poor throw before a later mistake gave Gareth Bale his second goal in Real's 3-1 win.

Karius complained to the referee at the time about the challenge and underwent treatment before being allowed to continue.

It emerged on ESPN FC on Monday that Liverpool's medical staff were concerned about the possibility of Karius suffering a concussion, and although the goalkeeper went on holiday to the United States after the final, he was sent to Boston to visit head trauma specialist Dr Ross Zafonte at Massachusetts General Hospital last Thursday under encouragement from the club.

And the ECHO understands Karius did indeed visit Dr Zafonte, who is known as a leading authority on the treatment of NFL players who have suffered head trauma, following consultation with Liverpool's Boston-based owners, Fenway Sports Group.