Newcastle United haven’t been that busy so far this summer. The Magpies have sanctioned a few sales in order to comply with Profit and Sustainability rules, but in terms of new arrivals at St James’ Park, things have been rather quiet. However, that could soon change. Indeed, Newcastle remain the richest club in the world, and they have serious ambitions to push on and progress under Eddie Howe. A new centre-back is a priority signing for Newcastle this summer as they look to deal with Sven Botman’s injury issues and Fabian Schar’s advancing years. Antonio Silva is said to be a player the Magp…