Robert Lewandowski has again taken aim at Bayern Munich's transfer policy.

The Poland striker, a long-term target for Real Madrid and Liverpool, says Bayern's squad lacks depth this season.

Speaking to Bild, he said: "This season it's really hard for me.

"I have played for Bayern and the national team every three days from the beginning.

"But no player can play 90 minutes in every game of a season."

Lewandowski has already hit out at Bayern for not competing at the top end of the European transfer market this year.