The RB Leipzig forward is fast becoming a top target for several Premier League clubs.
As he has a release clause in his contract, clubs can bring him in for a reasonable fee.
Sesko scored in each of his final six games to round off the Bundesliga season.
He is only 21 and plays for Slovenia at international level, while he netted 14 goals in the German league last term.
Sesko is thought to be mulling over his future and will likely commit to a club in the coming weeks.
