Tony Cascarino has issued his verdict on whether Mikel Arteta could now leave Arsenal to become the next boss of Barcelona in the summer. Xavi became the second boss of the week to announce that he will leave one of the world’s biggest clubs this summer. The 44-year-old has spent just over two years at Camp Nou. Unsurprisingly, there has already been speculation that Barcelona could be interested in Mikel Arteta. Arteta spent time at La Masia before the turn of the century. And he began his professional career with Barcelona B. And of course, he has done a phenomenal job at Arsenal. Tony Casca…