The versatile forward played an important part in securing Nottingham Forest’s safety in the top flight this season.
Johnson scored ten goals and provided three assists in 44 all-competition matches for the Garibaldi.
Although Steve Cooper will be keen to keep the Welshman at the City Ground for the upcoming season, clubs have shortlisted Johnson after his breakout season in the Premier League.
Everton and West Ham are now showing interest in Nottingham Forest’s Johnson who is valued at £40m by the club.