Sarkic was currently away on international duty with Montenegro, but reportedly fell ill and was pronounced dead early this morning.
The Millwall goalkeeper was man-of the-match during Montenegro’s 2-0 defeat to Belgium last Wednesday.
“Millwall Football Club is completely devastated to announce that Matija Sarkic has passed away at the age of 26,” read a club statement.
“Sarkic, The Lions’ number one goalkeeper, made 33 appearances for the club since joining from Wolverhampton Wanderers in August 2023.
“A Montenegro international, Matija proudly represented his country on numerous occasions.
“Everyone at the club sends their love and condolences to Matija’s family and friends at this immensely sad time.
“The club will make no further comment at this time and asks that the privacy of Matija’s family is respected.”
More to follow…