Manchester United's pre-season campaign kicked off with a 0-0 draw against newly-promoted Leeds United in Stockholm, but it was the performance of young full-back Diego Leon that caught the eye.

Leon, an 18-year-old Paraguay Under-20 international, was given the nod to start by head coach Ruben Amorim, and he didn't disappoint. The teenager, who recently signed from Cerro Porteno, showed glimpses of his potential with a composed display, particularly in the first half.

One of the highlights of Leon's performance came towards the end of the first half when he delivered a delicate pass to Chido Obi inside the penalty area. This touch of finesse was unexpected from a player of his size and age, suggesting that Leon has the technical ability to thrive at the highest level.

Leon's physicality was also on display, as he held his own against Leeds' attacking threats. However, he did show signs of fatigue in the second half, a reminder of the intensity he will need to adapt to in the Premier League. Despite this, he managed to recover well and was not exposed again after initially being caught out by overlapping runs from Willy Gnonto and Jayden Bogle.

Leon's confidence was evident when he attempted to convert a rebound from a deflected Casemiro shot, even though the angle was almost impossible. While he didn't succeed, his willingness to take on such a challenge bodes well for his future development.

Manchester United's veteran goalkeeper Tom Heaton also played a crucial role in the stalemate, making three excellent saves in the second half to keep Leeds at bay. With Andre Onana injured, Heaton is pushing Altay Bayindir for the interim first-choice role, and his experience could prove invaluable in the coming season.

Leeds, meanwhile, showed signs of promise but will need to improve before their return to the Premier League. Manager Daniel Farke will be encouraged by the news that the club has agreed a £17m deal for Hoffenheim midfielder Anton Stach, which should bolster their squad ahead of the new season.

As both teams prepare for their upcoming fixtures, the focus will be on integrating new signings and fine-tuning their tactics. For Manchester United, the emergence of Diego Leon is a positive sign, and fans will be eager to see how he develops in the coming months.