Javier Hernandez is already unsettled at West Ham.
Don Balon says Chicharito, having arrived in the summer from Bayer Leverkusen, already wants to leave West Ham, despite being relatively happy in the capital.
Both teams are flying in La Liga and whether they make a move for him remains to be seen.
Sevilla sit second in the table, winning five of their first seven games.
And Valencia are third, six points off the summit.