The goalkeeper was pleased with the manner in which his side responded after they secured a 3-2 victory at the DW Stadium despite falling behind to an early own goal
The Belgium international was happy with the resolve the team showed after an early David Vaughan own goal was cancelled out by a penalty from Craig Gardner and two goals from Steven Fletcher before half-time.
"We did well after going 1-0 down away to Wigan, a very good footballing side who can score goals," Mignolet told the club's official website.
"Vaughany was unlucky [with the own goal] but the way we responded was more important. To score three goals of our own, get the three points and move up the table is what it's all about."
Mignolet was responsible for keeping the score at 3-1 at the beginning of the second half by denying Shaun Maloney with what proved to be a crucial save after Angelo Henriquez later pulled one back for Wigan.
"It was a good shot to be fair and I was very happy with the save," Mignolet explained. "It was only about the 50th minute or something like that, and if the ball had gone in it would have been a tough task to hang on.
"Therefore [the save] helped the team out. We did concede later in the game but we only had to defend for 10 more minutes as opposed to more than half an hour."
The 24-year-old also paid tribute to the 5,000 travelling Sunderland supporters that ventured down to Lancashire despite the snowy weather.
"The fans were unbelievable," he added. "For 5,000 people to travel down in the wintry conditions and support us was fantastic.
"It felt like we were playing a home game out there and I'm just glad we could give them something back by winning the game."