By 90min Staff 90min rounds up the latest transfer news, rumours and gossip circulating around the world… Barcelona manager Hansi Flick wants to build his midfield around Manchester United midfielder Kobbie Mainoo and the La Liga side have offered £8.5m plus winger Raphinha in a swap deal for the England international. (El Nacional – Spain) Arsenal are seeking a guaranteed fee of £40m to part ways with goalkeeper Aaron Ramsdale this summer. (The Sun) Progress has been made in Chelsea’s pursuit of Crystal Palace winger Michael Olise, who is also wanted by Man Utd. (Felix Johnston) Leaving Che…