The Spain international has not played since he suffered a partial tear of an internal ligament in his right knee in March.
German newspaper Munchner Merkur is reported to have written that Alcantara will not return to action until October at the earliest, but the 23-year-old addressed these claims on social media.
There is no relapse! I keep working every day to strengthen my knee and be back as strong as I expected— Thiago Alcantara (@Thiago6) August 11, 2014
Bayern kick off their 2014-15 campaign with a DFL-Supercup fixture against Borussia Dortmund at the Signal Iduna Park on Wednesday.