The second round of the League Cup (known as the Carabao Cup in 2017-18 for sponsorship reasons) kicks off on Tuesday with 13 Premier League clubs in action.
[ MORE: League Cup scores live ]
All 13 have been drawn against lower-league opposition and those klaxons you can hear signify upset alerts.
Below is a look at how each Premier League club will get on as they enter the competition on Tuesday and Wednesday with a ranking on each game out of 10, with 10 being the most likely for an upset to occur.
Remember: the seven PL teams in European competition will enter the League Cup in the third round.
Upset alert ranking for PL clubs
Crystal Palace vs. Ipswich Town – 8/10
Brighton vs. Barnet – 4/10
Accrington Stanley vs. West Brom – 7/10
Sheffield United vs. Leicester City – 6/10
Birmingham City vs. Bournemouth – 7/10
Watford vs. Bristol City – 5/10
MK Dons vs. Swansea City – 5/10
Newcastle United vs. Nottingham Forest – 6/10
Southampton vs. Wolves – 7/10
Huddersfield Town vs. Rotherham United – 7/10
Cheltenham vs. West Ham United – 8/10
Stoke City vs. Rochdale – 6/10
Blackburn Rovers vs. Burnley – 6/10