The Real Madrid star has been plagued by injuries, but his coach has stressed that he is approaching peak fitness again.
The prolific attacker was plagued by injuries toward the end of the 2013-14 campaign, while his physical problems also affected his preseason.
Ancelotti has made it clear that Ronaldo is raring to go again ahead of Madrid's La Liga opener at home against Cordoba on Monday.
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"Ronaldo trained well and he's available for the match against Cordoba. He has no problems," Ancelotti said at a news conference. "His preseason was not very regular because he needed individual work to resolve his niggles. Last season, he had tendinitis and he needed individual exercises to sort it out.
"We will have to make full use of next week to do training and specific work to improve his condition. It will be good for him."
The 29-year-old netted 31 goals in 30 league appearances last season.