Pompey kept their hopes of reaching the League One playoffs alive with their fourth win on the bounce, and the former Wolverhampton Wanderers boss has urged his players to keep the momentum going.
"It's a massive one. That's four wins on the spin at the right time," he told Sky Sports News.
"Wigan are a very good side, our keeper made two really key saves in the second period.
"I'm really proud of the players. The important thing is with six games to go we keep the momentum going."
Portsmouth climbed up to ninth in the table when they defeated Wigan, level on points with the four teams directly above them, while the Latics remain third.