Why roger fedrer doesn't play in doubles in grand slams?

Roger Federer has primarily focused on singles competition in Grand Slam tournaments to maximize his chances of success and manage his physical condition. Doubles matches can be physically demanding and may increase the risk of injury, which is particularly important for a player of his age and career longevity. Additionally, Federer has often prioritized his singles career, where he has achieved the most recognition and success. As a result, he has chosen to reserve his energy for singles play during these prestigious events.