Wimbledon champion Novak Djokovic says he had "mental hurdles" to overcome as he fought back from injury problems.
The Serb has written an emotional letter to his friends and family after beating Kevin Anderson to claim his first Grand Slam title in two years.
He credited a "golden balance between tennis, priorities and family" with helping him refocus.
"I was trying to find solutions somewhere else and solution was always inside of me," the 31-year-old wrote.
Djokovic celebrated winning his 13th major title with his three-year-old son, Stefan.
"My whole - more or less - was about tennis until I became a father and husband," he said.