Grimsby Town 2-1 Barnet
Grimsby retained fourth place in the Conference Premier with victory over fellow promotion chasers Barnet.
Ross Hannah bagged the opener by smashing a half-volley into the top corner from the edge of the box.
Liam Hearn added the second with a simple right-footed finish after Andy Cook skipped into the box and unselfishly squared to him.
Dave Stephens fired in a stunning volley from 25 yards to halve the deficit, but the Mariners held on.
VIEW FROM THE DRESSING ROOM
Grimsby Town manager Paul Hurst told BBC Radio Humberside:
"The players deserve loads of credit.
"We had a tough run in terms of the amount of effort we have had to put into games recently
"At half-time I said Portsmouth would knock the ball around and I spoke about the patience we would need.
"I thought more than any team we have played it would be a very different game at it was."