Bayern Munich have extended the contracts of Thomas Muller, Jerome Boateng and Javi Martinez until 2021 while Xabi Alonso has signed a new deal until 2017.

Muller has been linked to a move to Manchester United in the recent past.

"We're delighted these important players have made long-term commitments," chairman Karl-Heinz Rummenigge told the club's official website. "Thomas, Jerome and Javi know how to win trophies, including the Champions League. They will add quality and stability to our team in the long run."

Muller took to Twitter after the deals were announced, writing: "I'm proud and happy to tell you that I have extended my contract at Bayern until 30.06.2021."