A man is in custody after being charged with the sexual assault of a child over a two-year period at a gym in Sydney's west.
The boy was allegedly assaulted at the gym in Guildford West by a man between January 2019 and December 2020.
The 33-year-old man was arrested on Tuesday evening after a member of the boy's family approached police.
The Woodpark man faces charged of aggravated sexual assault of a child and intentionally sexually touching a child.
He will appear before Fairfield Local Court on Wednesday.