Everton and West Ham could be engaged in a transfer tug of war this summer.
The winger is the subject of serious interest from both teams, per The Mail, after an impressive season.
Johnson was one of the key reasons for Forest avoiding relegation in their first season back in the top flight.
The source adds that Forest value Johnson at around £40 million and are not eager to sell.
The attacker managed 44 games in all competitions, scoring eight goals in the Premier League and two in the Carabao Cup.