Benfica's Paraguayan international striker Oscar Cardozo is being watched by Everton boss David Moyes.
The Daily Mail says Moyes was at Benfica's Stadium of Light Stadium in Lisbon on Saturday to see 6ft 4ins Cardozo score the winning goal from a penalty in a 1-0 league win against Belenenses.
Cardozo, 26, has also been linked with Aston Villa, Tottenham and Blackburn.
Moyes was also in Portugal to see UEFA Cup opponents Sporting draw 0-0 at Pacos de Ferreira on the same day, but took advantage of the opportunity to watch Cardozo.