Colby Bishop’s goal earned Portsmouth a 1-0 win over 10-man Watford which sealed their safety in the Sky Bet Championship.
Pompey are six points clear of the drop zone with two games to play but, with Hull and Derby still to play each other, their status in the second tier is secure.
The hosts scored the only goal after 25 minutes through Bishop, who nodded the ball home from close range.
Watford were then reduced to 10 men in the 57th minute when Kevin Keben was sent off for bringing down Josh Murphy just outside the area.
