Their most recent Shield challenge was on 9 July 2010 against current holders Southland.
Porto's last participation in the Fairs Cup, in 1969-70, also ended in the second round, with a defeat against holders Newcastle United.
"And there will be revolts against bad holders?"
The Third Round draw was made on 4 December 2011, and gave United an away match against holders Manchester City.
In a final against long-time rivals, Portugal, the hosts and holders Spain won their fifth consecutive European title.
It is empowered to appoint, remove, and take disciplinary action against holders of public offices.
The most damaging ruling was a 1974 decision against holders of small amounts of stock who alleged that brokers were charging them artificially high prices.
This set up a tie against holders Barcelona, the sixth time the two clubs had been drawn against each other in the competition, and the fifth in eight years.
He scored a late winning goal in the Scottish Cup tie against holders and Edinburgh derby rivals Hearts.