ABBA penalties: What is the new system? Which cups will it feature

The ABBA penalty format was used in Sunday's Community Shield as part of a new trial which has been rolled out across various international tournaments this summer.

A comparison of penalty shootout designs in soccer

Steven Gerrard hits the nail on the head when explaining why the new ABBA penalty format is not an improvement - Irish Mirror Online

New penalty shootout system known as 'ABBA' to be trialled

UEFA to trial alternative 'ABBA' system for penalty shoot-outs - Eurosport

Carabao Cup: Are there replays in the League Cup or does it go to extra-time and penalties?

New ABBA penalty shootout system to be used in all EFL competitions from start of new season

Women's World Cup Daily: Sweden send USWNT out after penalty drama - ESPN

Penalty shootout: Rules and all you need to know

ABBA penalty shootout trials yield a more fair, balanced format - Sports Illustrated