Arsenal are exploring a shock deal to sign Vinicius Junior from Real Madrid.According to the Press Association, Arsenal have inquired about the Brazil international, who has one year remaining on his contract at the Bernabeu.It is believed that a move for Vinicius who scored 22 times for Real last season and netted four goals for Brazil at the World Cup is in its very formative stages as manager Mikel Arteta looks to land a marquee signing to build on the clubs first Premier League title in more than two decades.Vinicius Junior is on Arsenals radar (PA Wire)Vinicius, 26, fits that bill with Atletico Madrids Julian Alvarez, RB Leipzigs Yan Diomande and Bradley Barcola of Paris Saint-Germain also on their radar.Arsenal bolstered their attacking options with the 34m signing of Christos Tzolis from Club Brugge earlier this week.Morgan Rogers had also been identified as a target, but it is believed Arsenal were not prepared to pay more than 80m for the England international, who ultimately joined Chelsea in a 117m deal a British record fee.Vinicius future at Real is uncertain following Jose Mourinhos return and the club could look to cash in on the player, rather than risk losing him for nothing in a years time.Mourinho, who has signed a three-year deal at the Bernabeu, was criticised for comments he made after Vinicius accused Benficas Gianluca Prestianni of racially abusing him during a Champions League tie in February.Mourinho, Benfica manager at the time, said something happens, always in matches where Vinicius plays. Prestianni was banned for six matches after he admitted to using homophobic language towards Vinicius.Jose Mourinhos Real Madrid return has left Vini Jrs Real Madrid future in doubt (PA)Tzolis followed Piero Hincapie who turned his temporary deal with Arsenal into a full-time switch and goalkeeper Illan Meslier, a free signing from Leeds, as the Gunners third signing.Newcastles Bruno Guimaraes could also move to the Emirates with Arsenal keen on the Brazil international.Speaking after Newcastles 1-1 pre-season draw at Gateshead on Saturday, manager Eddie Howe said: We dont want to lose our best playersIve spoken to him (Guimaraes) as I would do. Bruno is just a fantastic person. Weve had some really good conversations, both before the World Cup, during the World Cup and after the World Cup.I dont know whats going to happen with Brunos future. Thats for other people to, one, speculate about, but also conversations that Im not part of.