Adelaide United captain Eugene Galekovic doubts any other club could have done it.
The Reds went from winless and last after eight rounds to be crowned A-League champions with a 3-1 grand final victory against Western Sydney on Sunday.
The grand final triumph delivered Adelaide the double - they also collected the Premiers Plate - in an achievement Galekovic says will take some time to sink in.
"Winning a championship, it's hard to explain until you have actually done it," he said.
"To do the double from the position we were at after round eight, not many teams could have done that.
"We stuck together and fought to the end."
United skipped to a 2-0 lead against the Wanderers by the 34th minute after goals to Bruce Kamau and a top-shelf long-range free kick from Isaias.
But the Wanderers hit back in the 58th minute when Scott Neville fired a powerful first-timer into the net.
"We knew Western Sydney can come back, we saw that last week," Galekovic said, referring to the Wanderers' come-from-behind 5-4 semi-final win against Brisbane.
"We knew it was going to be tough, especially when they scored that goal.
"It was nervous times but defensively we have been great for most of the season and we knew we could hold them off."