The former Honved and Real Madrid star died at the age of 79.
Ferguson said: “I was lucky to see Puskas play quite a few times. I have many memories of him. I was at the European Cup final in 1960 but I also saw him score the only goal against Rangers at Ibrox, before he got a hat-trick against them when Real scored six in the second leg.
“In his day he was a special player without question, part of that great period for Hungarian football. How they did not win the World Cup in 1954 is beyond me.
“It is sad news. But when a great player like that passes, you can at least reflect on what a great player he was and the great games he played in.”