The 37-year-old Swiss has been carefully managing his schedule in recent years, cutting out the clay-court segment of the season since 2017 to wring the most out of his ageing body.
"The good thing is after feeling good in practice I played a good Laver Cup, have had also some rest after the US Open," said Federer.
World number one Rafael Nadal, beaten by Federer in last year's final of the Masters 1000 showpiece, is absent with injury.
Not so Federer, it seems, who is seven years older than the Argentine.
"I feel like I'm where I want to be," Federer said.
"I know that this is where I could be playing a lot of tennis, depending on how I play." Reflecting on his 2018, which included winning the Australian Open and several weeks back at world number one, Federer said: "I have actually been very successful when I played.
"I didn't play many poor matches, to be quite honest. There is only maybe a couple that come to my mind and I have been injury-free for over a year now." Federer, who is chasing his fourth title this season, will face either Chinese wildcard Zhang Ze or feisty Russian Daniil Medvedev in his opener.
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