The 25-year-old, who has 12 goals and nine assists in all competitions this season, has contributed to eight goals in his last seven league matches in a stunning run of form.
The Colombia international has been heavily linked with a move to a major European side beyond this season and his contract reportedly contains a €28million release clause.
"I've received many offers," he told Radio Magica. "I have proposals from Juventus, Inter, AC Milan and Roma. Spanish and English clubs have been making offers as well."
Muriel said last month that he would consider the prospect of joining Inter, who are expected to invest heavily in the playing squad ahead of next season in a bid to mount a title challenge.