Real Madrid and Arsenal are currently in negotiations to resign attacking midfielder Martin Odegaard. This would be a permanent deal.According to Spanish reports, Odegaard will not play in Saturday's opening match of La Liga at Alaves.22-year-old Odegaard spent the second half last season on loan at Arsenal. He made 14 appearances under MikelArteta.The estimated cost of the Norway international contract, which runs at the Bernabeu until 2023, is around 35-40m.Arsenal also expressed an interest in James Maddison, but Leicester are not keen to sell the England international.So far, the Gunners have signed Ben White and Albert Sambi Lokonga this summer.Before the August 31 transfer window closes, talks have been held to sign Tammy Abraham from Chelsea and Aaron Ramsdale respectively from Sheffield United.Arteta stated that anything is possible, and that there are many things to do and many clubs involved, ahead of Friday's Premier League season opening against Brentford.BrentfordArsenal Friday 13th of August, 7:00pm Kickoff 8:00pm"The ball has been rolling at a different speed over the past week. It has been a difficult transfer window. There are likely to be many things that happen over the next week."It's how deals are made and sometimes what is impossible to do on August 12th is possible on August 13th. It doesn't matter if you're happy to bring the player in, I believe it is more important.Sky Sports has the summer transfer window.Follow all the latest news and rumours about transfer in our Transfer Centre blog on Sky Sports' digital platforms. You can also keep track of all developments on Sky Sports News.