Tottenham are looking at new players this summer and now could end up battling Manchester United for one of Europe’s most in-demand defenders. Both Spurs and United have been active in the window already. United have signed Joshua Zirkzee and Leny Yoro, while Tottenham paid £40m for Archie Gray and brought Timo Werner back on loan. However, a new full-back is on the agenda for both teams. Pedro Porro is the main man for Spurs, while United are seeking a new right-back, with talk of United signing Noussair Mazraoui ahead of West Ham picking up traction yesterday. But according to Fabrizio Roman…