Celtic and Hibs fans are being warned to arrive early at Hampden Park for today's League Cup semi-final, as a new entry system has the potential to cause chaos.
The national stadium has installed barcode ticket machines, which will be used for the first time today.
While many stadiums, including Celtic Park and Easter Road, have such a system the new setup at Hampden will deny entry if fans don't use the correct turnstiles.
In addition there will be thorough searches of both sets of fans before entry.
As a result, supporters have been told to arrive in plenty of time for the 5.30pm kick-off.
Celtic advised: " Hampden Park has a new access control system in place and fans should arrive in plenty of time to avoid delays in entering the stadium.
"Enhanced search arrangements will be in place ahead of the game.
"Turnstiles will open 90 minutes before kick-off."
Celtic are looking to reach the League Cup final for the fourth season in a row, having lifted the trophy in each of the past three seasons.
Hibs appeared in the last final which didn't feature the Hoops, but lost to Ross County with a last-gasp Alex Schalk goal.
