Germany internationals Niklas Sule and Sebastian Rudy are interesting Everton.
The People says Everton boss Ronald Koeman is watching the pair.
Centre-half Sule, 21, and midfielder Rudy, 26, are both at Hoffenheim and have been monitored by Everton boss Koeman's spies.
Rudy was also checked out in midweek as he won his 12th cap in the 0-0 draw against Italy in Milan.
Sule, linked with Liverpool and Tottenham this season, came through the ranks at Hoffenheim while Rudy joined them from Stuttgart in 2010 and is in the final year of his deal.