Novak Djokovic says winning a 10th Australian Open to equal Rafael Nadal's record 22 Grand Slam men's titles is "the biggest victory" of his life.
He also had to deal with a hamstring injury and a row involving his father.
"Only the team and the family knows what we have been through in the last four or five weeks," said the Serb.
"I would say this is probably the biggest victory of my life, considering those circumstances."
Djokovic was overcome with emotion after sealing a straight-win over Greek third seed Tsitsipas on Rod Laver Arena.