The company owned by Cristiano Ronaldo's agent Jorge Mendes is under investigation by tax authorities in Portugal.
The news comes after a number of Mendes' clients - including Ronaldo, Radamel Falcao and Filipe Luis - have faced investigation in Spain over alleged tax evasion.
Now the authorities in Portugal are examining the accounts of Mendes' company GestiFute, with business over the past three years under scrutiny.
Local media, citing a source close to the matter, claims any material relating to Mendes himself is under suspicion.
A spokesman for GestiFute confirmed the investigation was taking place, and also said it was being conducted under "normal conditions."
It maintained the company had always fully cooperated with the tax authorities.