Sir Alex Ferguson attempted everything in his power to convince a former Arsenal star to sign for Manchester United and even invited the player to the training complex. The former Manchester United manager was known for bringing the best in class to Old Trafford, with Sir Alex Ferguson having an incredible sway with transfers. Despite managing to lure a roster of star-studded talent to the Premier League club, even Ferguson saw the highs and lows when it came to transfers in the window. The 82-year-old made marquee signings like Cristiano Ronaldo and Eric Cantona, but Ferguson also landed flop…