The Norwegian was named the PFA Scotland Player of the Year.
Celtic are currently swatting away the vultures gliding over their prized possession in Virgil van Dijk, as Premier League teams hope to lure the Dutchman away from north of the border.
They have already lost two loanees in John Guidetti and Jason Denayer - so losses are the current trend at Celtic Park.
The German outfit, who have never been relegated from the top-flight in their homeland, have come mighty close two years running. They played in the relegation play-off this summer and last, coming within seconds of demotion at the hands of Karlsruher at the start of this month.
Now they want to climb up the table, with Johansen just one of many names on their scouting list, according to Goal.de.
Johansen had an excellent first full season with Celtic under the guidance of his former Stromsgodset boss Ronny Deila.
He played 58 times for Celtic this term, scoring 13 goals and establishing himself as one of the best players in Scottish football.
It would certainly be an odd move for Johansen to head to Hamburg. He would be leaving Champions League football behind for a potential relegation battle.
So hopefully he will not take any offer into consideration.