Striker Pierre-Emerick Aubameyang of Chelsea is being pursued by Barcelona, Atletico Madrid, and AC Milan.

Less than five months after moving to Stamford Bridge, the Gabon international's future with the Blues is in doubt after he was left off of their Champions League roster.

The 33-year-chances old's of making the first team appear remote as the West Londoners try to bring in a younger squad after signing eight new players in January.

According to the Daily Mail, this has alerted the trio of European powerhouses to the issue around Aubameyang.

Following the marksman's successful run at the Camp Nou before joining Chelsea, Barca was eager to re-sign him, but financial fair play restrictions dashed those ambitions.

Although Milan and Atletico were also interested, FIFA regulations precluded him from playing for a third team this season.

The former captain of Arsenal started his career at the San Siro, when he scored both at home and away against the Rossoneri during the group stage of the Champions League.

He missed Friday's 0-0 draw between Chelsea and Fulham because he had been given the weekend off to fly to Milan.