Jose Mourinho feels that European glory for Manchester United on Wednesday will make Sir Alex Ferguson the 'greatest club manager'.
The Red Devils are set to face Barcelona in Rome next week in an eagerly-anticipated UEFA Champions League final.
Victory for United would see them become the first side to successfully defend the trophy in its current format, while also allowing them to add the continental crown to their Premier League and League Cup triumphs.
Ferguson's men have also added the Club World Cup trophy to their ever-growing list of achievements this season, with the Red Devils continuing to dominate both at home and abroad.
Their unrivalled success over the years is largely due to the tactical nous of their manager, and Inter Milan boss Mourinho is full of praise for the manner in which his Old Trafford counterpart goes about his business.
"He is a super manager and a victory or defeat in this moment of his career doesn't make him any better or any worse - he has had a great career," said the Portuguese.
"But of course if he wins on Wednesday it would make him the greatest club manager.
"Sir Alex has made a super team. Three Premier League titles in a row and two Champions league finals - that is really top.
"They have quality and experience, with Rio Ferdinand, Nemanja Vidic, Cristiano Ronaldo and Wayne Rooney. They have absolutely everything as a team: strength, mentality, speed, magic, solutions.
"Beating Arsenal in the semi-finals (of the Champions League) didn't impress me too much. It is normal.
"But three Premier League titles and two Champions League finals, you need no more words to explain how strong they are."