Real Madrid target Gareth Bale is also being tracked by Bundesliga champions Bayern Munich, according to reports.
The Tottenham attacker has been heavily linked with a move to Santiago Bernabeu in the summer, but The Sun have claimed that the German club are also interested in his services.
Former Barcelona boss Pep Guardiola will take over at Allianz Arena for next season, and has targeted the Wales international as a potential recruit.