The game looked as ​though it was heading for extra time ⁠when Finn Azaz was brought ​down in the area by Joachim Andersen, ​and substitute Ross Stewart converted from the spot.

It was no more than Championship side Southampton ​deserved as they made the better ​chances, including one for Azaz that was brilliantly ‌saved ⁠by Fulham keeper Benjamin Lecomte, who had earlier done well to deny Tom Fellows.

Southampton join a powerful-looking quartet already ​through to ​the ⁠last eight with Arsenal, Manchester City, Chelsea and Liverpool in ​the hat for the quarter-finals.

Fifth-round ​action ⁠continues on Sunday with third-tier Port Vale hosting Premier League Sunderland, and Leeds ⁠United ​at home to Norwich ​City. West Ham United play Brentford on Monday.