The Norwegian striker has been pulled with a foot injury, which has meant that he has missed Manchester City's last two games.
Against Fulham, Haaland made a comeback when he was substituted with half an hour left to play.
And it was the 22-year-old who became the tip of the iceberg.
Haaland scored the decisive goal, 2–1, from the penalty spot in the 95th minute, his 18th goal in twelve Premier League games.
The goal tasted extra good, as he had a goal disallowed after VAR review ten minutes after his substitution.
Julián Alvarez gave the home team the lead after a quarter, the equalizer came ten minutes later on a penalty through Andreas Pereira.
City - down a man from the 25th minute after João Cancelo was sent off for the visitors' penalty - are new league leaders after Saturday's 2-1 victory.
On Sunday, Arsenal can go top if they win against Chelsea.