Haaland scored an awesome 52 goals in 53 games to help fire City to Champions League, Premier League and FA Cup success. He was unable to make the difference as his team played out a 1-1 draw with title challengers Liverpool last week, though, and Gallas feels that performance proved the change in the 23-year-old's playing style compared to last season.
He added: "He was an animal last season. Defenders were frightened of his physicality – he didn’t give defenders a second to breath. He was running and fighting for every ball. For defenders, it’s so difficult to play against someone like him. In the game against Liverpool, he had two direct duels with Virgil van Dijk and he lost them both. In one situation he got off a shot, but it was an easy effort for Kelleher to save.
"Perhaps he is still tired. He was out for a few months and, since he has come back, he has played in almost every game for Manchester City. It’s normal for your energy to drop after a spell on the side lines. It looks like he could do with a breather at the moment."