Johnson isn't surprised to hear the likes of Tottenham and Liverpool are scouting the striker.
“I think that there are a few different types of striker in the Premier League and I don't think he would fit in at a team that isn't about physically and likes to play their way through to goal slowly.
“I could see Adams at Tottenham, with the way they play."
Johnson thinks that Adams would be a smart addition to Mauricio Pochettino's side ahead of next season.
He added: “He loves the ball in and around the box and I think he has what it takes to play at the very top.
“I tend to see him as a player that wants to be physical and wants the ball in behind to use his pace.
“I think he would also fit in perfectly at a team like Liverpool."