First-half goals from Joseph Mills and Mark Marshall were added to by Benny Ashley-Seal's brace in the second, while academy striker Caleb Chukwuemeka also scored his first senior goal for the club. Here are our player ratings from a wet night at the PTS....
1. Jonathan Mitchell
Hesitation with Mills almost proved costly but he atoned by smothering from Tella in what was his only meaningful save of the evening... 7
2. Michael Harriman
One of three full-backs at centre-back but his pace and mobility proved useful against Southampton's slippery forwards. Some excellent defending helped keep a clean sheet... 7.5 Photo: Pete Norton
3. Joe Martin
Played in the middle of the back three and used his defensive nous to stifle the visiting attack well. Strong response from his red at the weekend... 7.5
4. Joseph Mills
Making a strong claim to be Town's permanent free-kick taker. Drilled home a low effort to get the ball rolling on seven minutes and would have had another if not for Lewis' outstretched stop. Now has two in two in this comp... 8 Photo: Pete Norton