Borussia Dortmund and the 12th-placed team in Italy's Serie A, US Sassuolo, have agreed to extend their loan agreement for 25-year-old full-back Jeremy Toljan.

Toljan already spent last season on loan with the Italian side, making 24 appearances in Serie A and scoring one goal.

In addition, the loan agreement contains an obligation to buy that will automatically come into force when the conditions agreed between the two clubs are fulfilled.