Chilean side O'Higgins have confirmed that talks between the two clubs have taken place in regards to the 17-year-old's future.
Mauricio Valenzuela, the agent of the Chile Under-20 international, has now confirmed that a deal is close.
"The negotiations are very advanced with Chelsea," Valenzuela told Al Aire Libre en Cooperativa. "There are still a few details, but the situation is very advanced.
"We have been working on this for a while, the idea is that players can leave Chile and be successful.
"Chelsea had been following him for a couple of years, and the offer was made due to his good performances."
The midfielder will move to Stamford Bridge in the summer should the deal go through.