Borussia Dortmund sign Park Joo-ho from Mainz 05

South Korean full-back Park Joo-ho has joined Borussia Dortmund on a three-year contract from Mainz 05.

Recent reports have suggested that Dortmund are open to selling Kevin Grosskreutz before the end of the transfer window, and the signing of Park could allow the Germany international to secure a move.

Park, who has won 26 caps for his country, worked with Dortmund boss Thomas Tuchel at Mainz before the coach's departure from the club in May 2014.

The 28-year-old is expected to be included in the squad to face Hertha Berlin on Sunday.