Memphis Depay must start performing every week if he is ever to be mentioned in the same breath as Leo Messi and Cristiano Ronaldo, according to Raimond van der Gouw.
The 21-year-old arrived at Old Trafford for a fee of £31million this summer but has so far struggled to make an impression in the Premier League.
He did, however, show tremendous potential against Belgian outfit Club Brugge last month when he scored two and assisted another in a 3-1 win.
Van der Gouw, who spent six years playing for the Red Devils, is confident that his former club have signed an exceptional player, but believes Depay still has a long way to go to reach his enormous potential.
He told Goal: "It all looks good. The pressure to have success is high. Just look at Lionel Messi and Cristiano Ronaldo.
“Those two deliver every week on the highest level. Depay started well, and the expectations are high, but that's a good thing."
While pundits have been quick to praise the Netherlands international, there are already those who believe Depay's arrogance will eventually stop him from becoming a world-class player.
Top Dutch scout Henk Grim caused a stir in June after claiming Depay had the worst attitude of any player he had ever scouted. Southampton manager Ronald Koeman also admitted that he believes Manchester United overpaid.
Van der Gouw has also recognised that Depay has an inflated ego, and has urged his compatriot to remain grounded in his attempts to match the world's best.
“He's able to bring something extra and that's what you need when you're a top player. But he must be aware he doesn't get ahead of himself,” he added.
"A season lasts a long time and he must be careful not to burn up too quickly. But Van Gaal knows all about that.
“Memphis is so strong and eager, that's great to see. He makes me think of Ruud van Nistelrooy, he was also that eager.”