Borussia Dortmund striker Robert Lewandowski will reportedly complete a transfer to Bayern Munich at the start of the January transfer window.

The Polish international, who has less than 12 months left to run on his contract at the Westfalenstadion, was thought to have been keen on the move during the summer.

However, Dortmund held firm and insisted that the 25-year-old would see out the remainder of his deal with them.

In contrast, Polish news agency Pilka Nozna has today claimed that the centre-forward has agreed a four-year contract at the Allianz Arena, which he will sign at the turn of the New Year.

Lewandowski has scored 80 goals for Dortmund in the last three seasons.