Craig MacGillivray did not have too much to do throughout the 90 minutes at Fratton Park.
But he was called into action right at the death to prevent Pompey from suffering an undeserved defeat against Fleetwood.
The hosts had dominated for long periods, with Jayson Leutwiler the busier of the stoppers before the break.
But MacGillivray denied James Hill from point-blank range in stoppage-time to ensure the Blues climbed to second in the table.
The keeper said: “There was only one team in the second half that really looked like they were going to win the game.
“About 20 minutes from the end, you could see them slowing things down and trying to buy set-pieces to see if they could nick something that way.
"We were still trying to play on the front foot and get after them, but it’s still a point that keeps us on this run and it’s another clean sheet."
“We were still trying to play on the front foot and get after them, but it’s still a point that keeps us on this run and it’s another clean sheet.
“Fleetwood got a soft free-kick at the end and their guy’s made a good connection, but thankfully I managed to get it around the post.
“But that was the only thing I can remember having to do in the second half and the result gives us a platform to build on.”
Pompey would have reached the summit with a victory, although still entered the automatic promotion spots.
MacGillivray said: “It’s nice to be there, but we want to make sure that we’re in those top two places come the end of the season.
“At the minute, it’s just about collecting as many points as we can. We want to keep plugging away during this busy period.
“Everyone’s been looking at these games because of the positions are opponents are in, but we have to make sure we’re at it for every one.”