Denis Suarez is due to undergo a medical on Wednesday afternoon ahead of his loan move to Arsenal .
The Barcelona midfielder will spend the rest of the campaign with the Gunners after they agreed a £2million loan fee.
Suarez flew to London on Wednesday morning and is expected to complete the formalities in the next 24 hours.
Barcelona sanctioned the deal after the 25-year-old agreed to extend his contract at the Nou Camp.
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Arsenal will have to pay around £20m this summer if they want to make the move permanent.
Unai Emery worked with Suarez at Sevilla and the Emirates chief has explained what the player will add to his squad.
He said: “Generally speaking, we need wingers. And if you have a player like Denis, I know him because he played for me at Sevilla. His quality is this.”
Arsenal are also working on a loan deal for Yannick Carrasco.