"I've been at Bayern since 2008," said the 21-year-old. "It's long since become my club and I'm happy that everything is now set in stone and I'll be playing here until at least 2018."
'One of the best full-backs in Europe'
"David came to Bayern at 16 and has developed excellently since then," said Bayern's Chief Executive Karl-Heinz Rummenigge. "He's one of the best and most successful full-backs in Europe at the moment and we're very pleased to be able to count on his performances in the future."