Ruben Amorim has admitted that he ‘can’t repeat the mistakes’ he made as Manchester United manager with AC Milan.The former Red Devils boss is now willing to adapt his usually set-in-stone three-at-the-back system to better suit his squad.Amorim appears willing to change his system at AC Milan after criticism over his stubbornness at Man UnitedAFPAmorim gained a reputation for being stubborn at Man United, which ended up defining his nightmare 14-month tenure in charge.His refusal to change his tactics in the Premier League, despite things clearly not clicking, led to major backlash.And his sacking at the start of 2026 seemed inevitable, as he never changed his way of playing at Old Trafford.Now at AC Milan, where he was appointed in June, Amorim has set his team up in the same formation, but with a slight tweak. What has Ruben Amorim said?Amorim was delighted with Milan’s 3-0 win over Lecce on Sunday and admitted he allowed some more freedom in his system, with his side seemingly switching to a back four mid-game.He said: “A great victory. I liked the movement, especially the attacking depth. We managed the game and read the opponent well.“These are different times, but we’re improving. Today the players had more freedom; in recent games we were a bit too static, stuck.”“I can’t repeat my mistakes from Manchester,” Amorim then stated, revealing he may deviate from his usual style. “If we don’t have the characteristics to play a certain way, we have to adapt.“We’ll go back to building with three, but we’ll see. “Here in Italy, the coaches are very good, especially at going after other teams one-on-one.”Amorim has not lost a league game as AC Milan manager and has shown more freedom in his tacticsGettyHow is Amorim doing at AC Milan?Amorim has enjoyed a strong start to the Serie A season with AC Milan and is yet to lose a game in the league. And five games into the new campaign, his side have won three and drawn two, conceding the fourth-least goals in the division.They have also scored ten times in five games, which is the third-highest tally behind leaders Roma and rivals Inter.Amorim’s only defeat as Milan boss has come in the Europa League, as Benfica beat his men 2-0 in their League Phase opener.It appears he is enjoying himself in Italy, recently laughing with reporters about his time in the Premier League.In pre-season, his Milan came up against Man United and beat his old side 4-2, so there’s no surprise he was in a good mood.