Joe Willock has labelled one Arsenal transfer target ‘world-class’ after his performance on Saturday. Arsenal appear to be edging closer to building a perfectly-rounded team. The Gunners have improved from last season. Mikel Arteta’s men are still battling for both the Premier League title and the Champions League. And this really feels like the beginning of their journey, with several players still some years from their peaks. But clearly, fans will be hoping to see the club push the boat out in the summer. They are looking for the final pieces of the jigsaw. Joe Willock lauds Alexander Isak …