Alcacer has scored just three goals from 18 games for Barcelona since signing from Valencia.
The Spain international’s poor form means he is likely to leave the Nou Camp at the end of the season.
Spanish outlet Diario Gol claims that the Argentina international wants a world-class striker to replace him.
However, Diario Gol also says that Barcelona face a battle to get him off their books.
So bad has Alcacer been top clubs around Europe are unwilling to splash the cash to end his Catalonia catastrophe.
While Messi wants him gone, it may be easier said than done.
The former Valencia striker was once billed as one of the world’s top talents for the future.
But it appears a bad season at Barcelona could derail his promising career.