By 90min Staff 90min rounds up the latest transfer news, rumours and gossip circulating around the world… Manchester United are putting together a £58.6m (€70m) bid for Paris Saint-Germain forward Randal Kolo Muani despite signing Joshua Zirkzee this past summer. (Fichajes – Spain) Manchester City are lining up Porto’s Diogo Costa as a potential replacement for Ederson if the Brazilian goalkeeper leaves the Etihad Stadium after a turbulent summer. (CaughtOffside) However, the Cityzens have no intention of letting understudy Stefan Ortega leave during the January transfer window. (Fabrizio Ro…