The train operator said some services may be cancelled today due to the availability of drivers.
Travellers are asked to plan their journey ahead and keep an eye out for updates online.
This comes ahead of a “challenging” day as Celtic will face Rangers today from 3.30pm at Hampden Park.
Services are expected to be busy and fans are urged to allow extra travel time.
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Celtic supporters are advised to use services from Glasgow Central to Kings Park, while Rangers’ supporters will be directed to Mount Florida.
The same system will operate after the final whistle.
The company also warned that Glasgow will be crawling with Christmas shoppers and people visiting the markets, who are also asked to plan ahead.
⚠️Services are expected to be very busy today due to the Scottish League Cup Final, people out Christmas shopping & visiting Christmas markets etc.
👉Please check your journey before you travel on our app/website & buy return mTickets on our app to avoid queuing at stations.
— ScotRail (@ScotRail) December 15, 2024