Tottenham would love a new forward this summer but one potential target appears on course to join Manchester United or AC Milan. It’s no secret that Tottenham have never quite spent the money they got for Harry Kane on an even remotely suitable replacement. However, this summer could see that replacement signed as Ange Postecoglou calls for improvements across the whole club. Of course, there are some good forwards out there doing the business who Tottenham are known admirers of. But according to Alasdair Gold, there’s one potential signing who looks less likely right now. Why Joshua Zirkzee i…