Ruben Amorim and the tactical revolution at Old Trafford: When the 3-4-3 system is expected to change Manchester United's fate

Bui Son is not an unfamiliar name for those who follow English football through the lens of a special correspondent. Born in Vietnam, working in Manchester, he spent 5 full years following the youth teams at Carrington before moving to the Manchester Evening News newsroom. With experience verifying exclusive transfer news about James Garner and the 'Summer Without Football' series during COVID-19, Bui Son brings the Beat Keeper perspective - a reporter dedicated to following a football team - meticulous and steeped in fieldwork. On those November afternoons, when late autumn sunlight filtered through the empty stands of Carrington, I witnessed a generation of young Manchester United players growing up day by day. They ran on the lush green grass whose color I remember more clearly than the score of any match. Those were the first steps at Carrington, the silent heartbeats that never appeared on the transfer news ticker. Now, as Ruben Amorim sits in the manager's chair at Manchester United, I realize one thing: Old Trafford is facing the biggest tactical turning point since Sir Alex Ferguson hung up his boots. The 3-4-3 system that Amorim brought from Sporting CP to Manchester is not simply a tactical formation. It is a complete football philosophy, requiring adaptation from individuals to collectives, from the dressing room to the pitch. What I learned after years of following managers in England is: changing the system is not difficult, changing the mindset is. With the 3-4-3 playing style, Manchester United needs at least three center-backs capable of building attacks from the back line. In the current squad, Lisandro Martinez is the closest perfect fit for this system - he has good technique, excellent line-breaking passing ability, and modern defensive thinking. However, the problem lies in squad depth: when Martinez is injured or needs rest, who will replace him? Harry Maguire was once expected to become a ball-playing center-back under Ole Gunnar Solskjaer, but his playing style suits a more traditional defensive system better. Raphael Varane, despite having Champions League experience, faces issues with declining fitness and pace with age. This is a problem Amorim needs to solve before thinking about bolder plans. Looking back at Manchester United's transfer history under Erik ten Hag, a concerning reality emerges clearly: the club spent 85 million pounds on Jadon Sancho, 73 million pounds on Rasmus Hojlund, 64 million pounds on Mason Mount - signings that haven't left a significant mark. When I compare these figures with what Sporting CP received from selling Bruno Fernandes to Manchester United himself (55 million pounds), the difference in investment efficiency is obvious. The January transfer window approaching will be Amorim's first real test of vision. According to sources I have verified through multiple rounds, Manchester United is considering selling some players to streamline the squad and create financial space for signings more suited to the new system. An interesting detail I noted from training sessions at Carrington: young players from the U21 level and above have been asked to try playing as wingbacks in practice matches. This indicates that Amorim is not only changing the first team but building a football philosophy from the roots. The first steps at Carrington, in some way, are being redirected. The upcoming match against a direct Premier League rival will be the first real test of the 3-4-3 system. I will be at Old Trafford early, as usual, with the black-covered notebook in hand. Because to understand a football team, you cannot just watch them play - you need to see them warm up, converse, and the silences in the dressing room. From the perspective of a journalist who has followed Manchester United through many seasons, I notice one thing: Amorim may not be the person to solve every problem immediately, but he is laying the foundation for a real revolution. And in football, sometimes starting in the right direction matters more than immediate results. Old Trafford is waiting for a change. And perhaps, this is the beginning of a new chapter.