Giggs: Praised by Ferguson after helping to inspire United to a 2-0 semi-final first-leg win over Schalke
United took a giant stride towards reaching next month's UEFA Champions League final at Wembley after second-half goals from Giggs and Wayne Rooney secured a comfortable success in Gelsenkirchen.
Giggs was pulling the strings from a central midfield role and the 37-year-old could easily have scored a hat-trick before breaking the deadlock midway through the second half.
The Welshman has agreed a contract to play on for the Red Devils next season and Ferguson is amazed by Giggs' longevity at the highest level.
"It is strange because Ryan's peak years seem to have lasted so long," said Ferguson.
"You would think, at 37, he would be showing signs of waning. I don't see any evidence of that.
"We look after him in terms of rest before games but when he gets that freshness he doesn't show any sign of fatiguing at all. He is an amazing man.""We look after him in terms of rest before games but when he gets that freshness he doesn't show any sign of fatiguing at all. He is an amazing man."
Sir Alex Ferguson on Ryan Giggs Quotes of the week
Only Schalke goalkeeper Manuel Neuer prevented United from building an even more commanding first-leg advantage, while the clean sheet ensured Ferguson's side have not conceded a goal away from home in Europe this season.
With a final showdown against Barcelona or Real Madrid now seemingly on the horizon, Ferguson ranked the display against Schalke on a par with his team's best in the Champions League.
The United boss added: "Overall I was delighted. It was a top performance.
"We have had some fantastic performances in Europe during my time.
"Juventus in Juventus in 1999 obviously will always be high on the list but this certainly ranks as one of the best."