Retiring Philipp Lahm believes he cannot give his all beyond this season

The 33-year-old has a year left on his contract with Bayern Munich.

Bayern Munich captain Philipp Lahm does not believe he will be able to maintain his high standards next year after announcing he will retire from football at the end of the season.

The 33-year-old has a year left on his contract with the defending Bundesliga champions but will walk away early - also saying he has rejected an offer from the club to become a sporting director.