The midfielder played a part in both goals as his side won 2-0 on Sunday.
The Magpies were 2-0 winners on Sunday in a surprise victory, with the Dutchman playing a role in both goals in his side’s triumph.
It was a much-needed three points against a resurgent Liverpool side, with Steve McClaren’s side showing the kind of fighting spirit that has been sorely lacking so far this season.
Wijnaldum, who joined Newcastle in the summer transfer window, has called upon the team to repeat that fight in future as they look to escape the relegation dogfight this season.
"It’s a really big result because we’ve had a few poor weeks. We reacted well today. We played as a team,” he told BBC Sport.
"Sometimes you need luck to score a goal. The first bit of luck was the ball staying at my feet. After that I shoot. He touched it - I still think it’s my goal because I’ve shot on goal.
"It’s always important and good if you win games because it will give you confidence. We must know we won’t win games easily. We must fight like we did today."
Unfortunately for Newcastle, the win was not enough to move them out of the bottom three, but it did take them a step closer to doing so.
The Magpies are now 18th in the table, level on points with Bournemouth and Norwich above them and only two points behind Chelsea in 15th.
Newcastle will know that the fight is far from over despite their impressive win, with Sunderland in 19th just one point behind them at present.