I have no idea if being cup-tied is a "thing" in this tournament, but Kamari Doyle didn't feature for Southampton so he is available for selection today.
Confirmation that, as @jackalbion says, you can pay on the gate for a fiver and that it will be available on youtube.
Preview: U21s face Brighton in Premier League International Cup quarter-finals
The fixture is on both clubs' websites. :shrug:
Bizarrely though, when you click through to the U-21 fixtures on Albion's website, it initially just shows PL2 fixtures (even though the filter says "All Competitions"). However, if you choose a diferent selection from the filter, and then click...