Manchester United, Liverpool and Manchester City sent representatives to watch Sporting Lisbon's game against Benfica on Sunday - only for the game to be called off due to damage to the Estádio da Luz.
The Premier League trio sent scouts to cast an eye over the Portuguese league's top talent.
However the game had to be called off as parts of the roof fell onto the pitch as strong winds dismantled the stadium.
The top of the table clash has been rearranged for Tuesday so the aforementioned clubs are expected to be attendance for the fixture.
Manchester United have been keeping a close eye on Benfica's Ezequiel Garay for some time now, as David Moyes has been scouring the transfer market for a long-term replacement to Nemanja Vidic.
His interest in Garay will have intensified over the last week as Vidic has confirmed his intention to leave Old Trafford at the end of the season.
The Premier League champions are also said to be keeping tabs on Sporting's William Carvalho - while Manchester City have been linked with making a move for Carlos Mane and Liverpool are tracking Benfica midfielder Andre Gomes.
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