When Manchester City signed Alf Inge Haaland from Leeds in 2000 following promotion to the Premier League, they couldn't have expected how important a deal it could be 21 years later.
Alf would go on to make 41 appearances for the Citizens, though his career at Maine Road was brought to an early end after Roy Keane brutally injured him in April 2001 in a Manchester derby.
Now, his son Erling will return to the city of Manchester to face up against Pep Guardiola's Manchester City at the Etihad Stadium in the Champions League.
Having scored 31 goals in 30 games so far this season, Haaland will arrive as Borussia Dortmund's major threat in the quarter-final clash.
"The numbers speak for themselves, of course he is one of the best strikers in the world right now at his age," Guardiola said of the Norwegian striker when asked about whether he had any interest in signing him.
"He's a player for Borussia Dortmund. You understand I cannot answer this question."
If Haaland were to one day join the Citizens, he would return to England, where he spent much of his childhood, and follow the path of his father, who played for Nottingham Forest and Leeds United as well as the Citizens.
Following father's footsteps
To this day, he remains a huge Leeds fan, despite having been born weeks after his father made the move from Elland Road to join Manchester City.
"I want to be the best possible, the dream is to win the Premier League with Leeds," Haaland said as a 16-year-old prodigy.
"In addition, the goal is to become a better player than dad was, I hope to be able to get more international matches than he did."
With seven appearances for Norway, compared to 34 for his father Alf, he has some way to go on that front, but a Premier League title may come much closer, even if it isn't with his beloved Leeds United.