Arsenal are ready to raise their current £38million offer for Lisandro Martinez as they compete with Manchester United to sign the Ajax defender.
United bid £38million on Friday with more guaranteed up front, while they also offer the chance to link up again with Erik ten Hag, who had a strong rapport with Martinez during his time in Amsterdam.
The 24-year-old is valued at £43million by Ajax but has told the club that he wants to move to the Premier League.
Martinez has kept a low profile so far out of respect to the reigning Eredivisie champions and their supporters as he is a popular figure at the club.