Manchester United have added Sporting Lisbon goalkeeper Rui Patricio to their list of potential targets to replace the retiring Edwin van der Sar.
United have been closely watching the 22-year-old Portuguese international in recent weeks after recommendations from Carlos Queiroz.
Arsenal and Chelsea have also been following him, but United would be favourites should they opt to sign him as they have a co-operation agreement with Sporting which has seen them sign Cristiano Ronaldo and Nani.
Patricio made his one and only appearance so far for Portugal in last November's 4-0 friendly win over Spain.
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Explore more:People: Cristiano Ronaldo, Edwin Van Der Sar, Nani, Carlos Queiroz Places: Spain, Portugal