I have been thinking about the drop in Haaland's form recently. First of all it is totally normal for any player of course. I have been just thinking about whether there could be a special reason affecting it as well. De Bruyne's absence came to my mind after that. The reason why is that there was a great relationship between these two players. 
De Bruyne was sending a lot of balls to Haaland to make him more active and effective in the attacking line. You know how great De Bruyne can pass the balls to his teammates. He is like a magician. I hope that Haaland can reach his usual level sooner or later. I'm still contented with his goal effort so far of course. But I would like to see him doing good during the full season as well.
However, even though Haaland has had a slight decline, he is still the most productive player in scoring goals in the Premier League. Because even now Haaland is still the temporary top scorer this season because he has scored 8 goals this season. Last season, Haaland was much more productive, but even this season, Haaland's performance is still good. The difference is that Haaland is now always more closely guarded by opponents. Because all opponents must realize that it is very dangerous if Haaland is left without tight guard. Because he can be an unstoppable goal scoring machine if the opponent is careless. De Bruyne is an important figure who always helps supply the ball to the attack line very well. But it's a shame because the injury was bad enough that he needed a recovery time of around 4 months. Maybe December or January before he will fully recover.De Bruyne was sending a lot of balls to Haaland to make him more active and effective in the attacking line. You know how great De Bruyne can pass the balls to his teammates. He is like a magician. I hope that Haaland can reach his usual level sooner or later. I'm still contented with his goal effort so far of course. But I would like to see him doing good during the full season as well.