Emery needs to bring in a left-back, centre-back, midfielder and at least one forward before the start of the new season and with a reported budget of around £45m to spend, I just don't see us spending it all on Vazquez and Diaz. He went on to take up that role of general coordinator with Brazil in 2016, and leaves with the Selecao having secured a first Copa America since 2007.
The 41-year-old is the first technical director in the history of Arsenal.
The Brazilian flew in from Rio de Janeiro and immediately joined Arsenal on their tour to the United States.
Former Arsenal player Edu has been appointed as the technical director at the club on Tuesday.
And there could be more transfer activity from the club in the coming days, with reports suggesting a deal for Saint-Etienne defender William Saliba is close to completion.
Here, we look at some of the top football transfer stories from the British and world media in The Sport Review's Grapevine, published every day in the build-up to the 2019 summer transfer window.
Edu will work closely with head coach Unai Emery, whom he played for at Valencia.
Mariano Diaz, who was re-signed by Real Madrid last season after he enjoyed a successful season at Lyon has been off to a slow start in Madrid.
He also won the FA Cup on two occasions. 'His arrival is the final and very important part of the jigsaw in our development of a new football infrastructure to take us forward.
Former Brazil global Edu spent five seasons with Arsenal between 2001-2005, winning two Premier League titles and two FA Cups.
Arsenal's head of football Raul Sanllehi turned to Edu after a move for famed talent-spotter Monchi fell through after the Spaniard chose to return to Sevilla. It is the first time the Gunners have employed someone in such a role.