Arsenal boss Arsene Wenger says offensive midfielder Alexis Sanchez was thrown back into action earlier than expected at the start of the campaign.
The Chilean lifted the 2015 Copa America in the summer but came on as a substitute in Arsenal's first game of the season against West Ham United.
He is yet to score for the Gunners this season but the 65-year-old says the Chilean's form is not a concern.
"I played him very early before he was completely fit, physically," Wenger explained.
"That is one explanation [for his form]. The second is that every player who has won a big trophy with his national team takes some while to settle and come back to his best. These are the two main explanations for me.
"I think he has had 31 shots on goal since the start of the season and with his finishing qualities that should allow him five to six goals.
"Knowing that the finishing is a bit linked with your form and it is a bit cyclic as well, that is where he should be at the moment.
"That will come back, I don't worry for Alexis Sanchez. Even when he doesn't score he is still a major threat for everybody and I am confident he will score very soon."