Liverpool are poised to complete the signing of Javi Manquillo after the defender missed training in the Spanish capital in order to travel to Melwood to undergo a medical.
Marca report the 20-year-old has been given permission to visit Merseyside to complete a move that is likely to see him join Brendan Rodgers' side on a two-year loan deal, with the option to buy at the end of this season.
The move follows the arrival of 27-year-old Cristian Ansaldi at the Vicente Calderon. The Argentina international has joined Atletico on a season-long loan deal from Zenit St Petersburg where he will be expected to provide cover for both Guilherme Siqueira and Juanfran at left and right back.
His arrival from the Russian Premier League champions frees up Manquillo to complete his move to Merseyside.
Manquillo will become the club's seventh signing of the summer transfer window following the arrivals of Rickie Lambert, Emre Can, Adam Lallana, Lazar Markovic, Dejan Lovren and Divock Origi.
He is likely to be joined by fellow Spaniard and full back Alberto Moreno in the coming days. After initial negotiations with Sevilla broke down prior to the World Cup, the Reds have reportedly agreed a fee of €20m (£15.9m) with the Andalusian club to see the 22-year-old left back return to Anfield.
Seville-based newspaper Estadio Deportivo, who were first to reveal that initial negotiations between the clubs had broken down last month, suggests a deal is on the verge of being announced after fresh talks.
According to the report, Moreno has already agreed a five-year contract with the Merseyside club, a deal worth €1.5m a year, and is likely to officially leave the club in the coming days.
Liverpool meanwhile are preparing for a pre-season clash with Manchester United in Miami. The Premier League arch-rivals meet in the International Champions Cup final in the conclusion of their respective tours of the United States.