The French is linked with a jump to Manchester United After failing to make his mark at the Nou Camp.
Dembele joined Barcelona in 2017 for £ 135m after appearing with Borussia Dortmund.
However, things did not go well in Catalonia for the 23-year-old, who played only nine matches in all competitions last season after suffering a severe torn hamstring, which forced him to undergo surgery.
Barcelona’s new president Koeman has revamped his squad this summer, and it looks like he may be out of the club.
There is increasing competition for places in Barcelona Offensive line.
The rise of young Ansu Fati made him a regular in the first team, while newcomer Francisco Trinkau was also dumped in the mix.
Philippe Coutinho is expected to be given a second chance at Barcelona, after he returned from the Champions League victory on loan with Bayern Munich.
ESPN It is reported that United have identified Dembele as a sign-up if they fail to get their hands on Jadon Sancho – something increasingly likely
But rather than spending a lot of money on a player who has barely played in the past two years, it is believed that he would prefer a season-long seed loan with a commitment to buy.
Dembele has done little to improve his chances of changing Koman’s mind after late reports of the training session Monday morning.
Marca claimed that the former Rennes man was 15 minutes late for Ciutat Esportiva Joan Gamper’s training complex.
Koeman is believed to demand a lot of respect for deadlines and regulation, and he ordered players to arrive for at least an hour before he even started.