Dustin Johnson denies having drug problem

"I would drink and drink to excess. The change I made is I just don’t do that any more."

American Dustin Johnson denies he has had a drug problem but admits “drinking to excess” was an issue he had to address.

The 30-year-old, who on Tuesday night announced the birth of his first child, a son, with fiancee Paulina Gretsky, is currently on a voluntary leave of absence from the PGA Tour.