Austrian international left-back David Alaba has extended his contract with Bayern Munch until 2021, the Bundesliga club announced Friday.

Alaba, 23, becomes the fourth player to prolong their stay at Bayern alongside striker Thomas Muller and central defenders Jerome Boateng and Javi Martinez.

"I'm proud that I'll continue to play for my club. I grew up at FC Bayern and I've experienced unbelievably wonderful moments here. We're all hungry to add further trophies to the ones we've already won," said Alaba, who touched down in Bavaria in 2008 when just 16 years old.

Bayern chairman Karl-Heinz Rummenigge added: "David Alaba is an FC Bayern youth product, so we are especially delighted at his signature today keeping him here at least until 2021.

"He is one of the players who gives our current team its character. The way he plays, but also how he conducts himself away from the field, are the embodiment of FC Bayern. He will continue to be one of the cornerstones of our team in the years to come."