Oh Robin van Persie. That was the chant that used to fill Old Trafford (and the Emirates) back when the Dutchman was firing on all cylinders in the Premier League, and it's arguably the exact same expression Manchester United probably let out with a sigh. Just how could they do with a striker like him now?

The 36-year-old will forever be remembered at United for his starring role in Sir Alex Ferguson's last Premier League title before his retirement, a campaign in which he smashed in 30 goals and provided a further 15 assists. He was truly at the peak of his powers, but, in a clip from Rafael van der Vaart's testimonial, it appears he hasn't lost any of his abilities.

The now-retired forward curled home a sumptuous finish from outside the box with his right foot, and the goal understandably saw United fans go into delirium.

Many supporters of the Manchester side flooded to Twitter to share their thoughts about the Dutchman, and insisted "class is always permanent".

Some Red Devils fans even voiced their disappointment about how the club let him go after just three seasons at the club, and revealed he should never have been sold.

Check out some of the reaction of United fans below: