Shortly after 35-year-old Novak Djokovic despatched another considerably younger player to win a 22nd Grand Slam title, his coach Goran Ivanisevic was asked how long the new Australian Open champion could stay at the top level.
"Definitely two, three more years," said Ivanisevic, who has helped Djokovic win seven of his major titles.
"His level is unbelievable. He is from outer space. His brain is working different."
Djokovic, who turns 36 in May, showed all facets of his greatness on the way to beating 24-year-old Stefanos Tsitsipas in Sunday's Melbourne final.
The Serb has won five of the past seven Grand Slams he has played in, although this victory came in a tournament where Spanish teenager Carlos Alcaraz - the world number one before the event and new leader of the next generation - was ruled out through injury.