FC Thun left-back Jose Goncalves and Marseille goalkeeper Rais M'Bolhi are on trial with Hearts.
The 19-year-old M'Bolhi is not in the first-team picture with his French club but is said to be interesting Metz, Sochaux, Panathinaikos and AEK Athens.
Goncalves, 20 and formerly of Basle and Venezia, has been linked with Rangers, Everton, Crystal Palace and Newcastle