He doesn’t score as many as he should
The Brazilian is a striker first and foremost so you’d expect him to have a good goals to games ratio.
Indeed, no disrespect to the Brazilian Serie A, he’s not in the hardest league in the world either but he only has 1 goal for every 4 games. That really isn’t enough for a striker that is potentially going to represent the Reds at the top of the Premier League so that needs to be thought about.