Chelsea have conducted thorough checks on Garnacho, including a series of background investigations into his character and personality.
Chelsea are satisfied with the results of their checks and are waiting for the required transfer fee and Manchester United's approval. United's valuation of Garnacho will be key to any potential deal.
Garnacho is inclined to stay in the Premier League. He has also been linked with Aston Villa, but it is understood that he hopes to move to a club that can compete in the Champions League, with Chelsea as his top choice.
Chelsea are expected to make an offer for Garnacho before the transfer window closes, but a decision may have to wait until Manchester United finalize their plans to sign a new striker, as the Old Trafford club aims to bring in Benjamin Šeško.
Chelsea also need to sell or loan out players to make room for more attackers. Christopher Nkunku and Armando Broja are expected to leave permanently, while Mark Guiu and Tyrique George will depart on loan.
Defender Jorrel Hato is set to join Chelsea from Ajax for £37 million, which will allow the club to focus on the transfers of Simons and Garnacho.
