Southampton booked their place in the Carabao Cup quarter-finals in dramatic style with a last-gasp victory over Stoke City. It’s a competition that has acted as a welcome distraction for Russell Martin, who has watched his side win just one point from their opening nine Premier League games. Southampton claimed a 5-3 victory over Cardiff City in the second round of the Carabao Cup before beating Everton on penalties and securing a dramatic late win over Stoke. Goals from Taylor Harwood-Bellis and Adam Armstrong were cancelled out by Ashley Phillips and Tom Cannon. But just as though it looked…