Borussia Dortmund are reportedly making plans for the summer exit of Shinji Kagawa, as Manchester United chase his signature.
The Japan international is out of contract at the end of next season and, as of yet, has not given a clear indication will extend his deal with Dortmund beyond its current terms.
Kagawa has been a key performer for Jurgen Klopp once again this season, and has netted 14 times as Dortmund claimed a second successive Bundesliga title.
Should Kagawa move to Old Trafford, or anywhere else for that matter, Klopp will reportedly move for Sochaux's Marvin Martin in order to replace the former.
Martin has previously been linked with a move to Arsenal, and the 24-year-old France international has also found himself generously compared to World Cup winner Zinedine Zidane.