Arsenal are set to sell three players before the summer transfer window slams shut on Tuesday.Gabriel Martinelli appears finally ready to complete his switch to Al-Hilal in a record sale for the Gunners, while Hamburg are said to be in advanced talks for the Portuguese creator Fabio Vieira. Barcelona are closing in on the signing of forward Gabriel Jesus in a deal believed to be worth 10 million euros (£8.6m) and is expected to be completed before Tuesday’s transfer deadline.Arsenal target Julian Alvarez did return to training with his Atletico Madrid teammates on Sunday with his future in Spain unclear, even if Barcelona are interested in the striker. The transfer window deadline is on Tuesday 1 September in England, the window shuts at 11pm BST; the transfer window for LaLiga shuts at 10.59pm on 1 September, while Bundesliga clubs must buy and sell players before a 31 August deadline at 7pm.In fullTransfer news LIVE: Alvarez to Arsenal latest, Gakpo set for City after Barcola’s Liverpool move