Sports Illustrated rounds up the latest  transfer  rumors and gossip from around the world. Premier League Rafael Leão could be on his way to Old Trafford. | sportinfoto/DeFodi Images/DeFodi/Getty Images Manchester United have made informal inquires about AC Milan winger Rafael Leão , whose price tag is €50 million (£43.3 million, $58.4 million). The Rossoneri would be willing to part with the Portugal international should the right offer come along. (Source: Calciomercato ) Liverpool have circled Athletic Club forward Nico Williams as their top target this summer. A deal in the range of €80 million (£69.3 million, $93.4 million) is being discussed to bring the Spaniard to Anfield. (Source: Fichajes ) Arsenal intend to have an active summer transfer window, with Atlético Madrid forward Julián Alvarez atop their shortlist of attacking reinforcements. The Gunners would have to shell out a record £130 million ($182 million) to prize him away from Spain.…