Berlin (AFP) - Bayern Munich announced on Friday they have extended the contract of Spanish midfielder Thiago Alcantara until 2021, a day after Bayern took out the buy option to sign French international winger Kingsley Coman from Juventus following a loan spell at the Allianz Arena.

Thiago has also added two years to his existing Bayern contract.

The 26-year-old Thiago was signed in 2013 when Bayern's ex-coach Pep Guardiola insisted he was the player he wanted to be brought in from Barcelona.

The attacking midfielder has been outstanding this season as a key element of Bayern's star-studded attack and has made 20 appearances for Spain since 2011.

"Thiago is one of the best and most sought-after midfielders in Europe," said Bayern's chairman Karl-Heinz Rummenigge.

"We are very pleased to be able to retain this outstanding professional in the long term."

Thiago has already won three straight German league titles with Bayern, having also lifted the Champions League trophy with Barcelona in 2011.

"My family and I feel very comfortable in Munich. Everything fits," he said. "I want to win many titles with FC Bayern in the future."

Bayern are licking their wounds after Wednesday's German Cup semi-final defeat to Borussia Dortmund, eight days after being knocked out of the Champions League quarter finals by Real Madrid.

However, Bayern will be confirmed German league winners for a fifth straight season on Saturday if they a win at Wolfsburg, and second-placed RB Leipzig lose or draw at home to Ingolstadt.