The Magpies need a stand-out performer now more than ever this season as their Premier League status hangs in the balance, with Benitez's boys 19th in the table and six points adrift of relegation - albeit with a game in hand, which is a visit of top four-chasing Manchester City.
Wijnaldum, who has netted nine times following his big money move from PSV Eindhoven last summer, has looked rather sluggish in recent months in a decline which is arguably more notable given his talent, with the Dutchman failing to score since January.
Asked about his form, the Spaniard said: “When you have players with international experience, players that can make the difference, you want to see them winning the games," he said to the Shields Gazette.
“When you see him in training, you can see he has so much quality that he can be the difference and we will support him to do that. What I want to see from every player is effort. They have to try and they have to give everything and if they are doing that they are good enough.
“If they do that, and they have a little bit of luck, then you will see the quality they have. There is that question of giving them confidence, but we are asking them to give everything on the pitch.”
How Benitez and United fans would love to see Wijnaldum rediscover his form in the club's final seven games of the season.
This, remember, is a player who scored four times in a single game against Norwich City in the first half of the season. He has the talent and the Spaniard just has to find a way to draw it out of him until May. Newcastle's Premier League lives might hinge on it.