The 24-year-old was injured in a challenge with Franck Kessie during the first-half of Bayern's pre-season defeat to AC Milan on Saturday. Diagnosis on his return to Munich revealed an ankle ligament tear.
Un día menos. La operación fue un éxito. Muchas gracias a todos!— Juan Bernat (@JuanBernat) 25 July 2017
One day less. The operation was a success. Thank you so much everyone! pic.twitter.com/MsOpO8SIgy
The Spaniard has made over 100 appearances for Bayern since joining the club from Valencia in the summer of 2014.