Marcus Rashford arrived in Barcelona on Sunday ahead of a season-long loan from Manchester United. Rashford will undergo a medical early in the week.
The terms include an option for the deal to be made permanent next summer with reports suggesting the price is fixed at around $34.9 million.
Barcelona previously pursued Nico Williams and Luis Diaz as they tried to improve the left wing.
A six-month loan to Aston Villa failed to develop into a permanent transfer at a pre-agreed fee of $53.6 million.