Nuno Espirito Santo has refused to be drawn on Arne Engels as speculation continues over West Ham’s interest in the Celtic midfielder. Engels has been heavily linked with a move to the Premier League this summer, with West Ham reported to be among the clubs interested in the Belgian. He said: (West Ham YouTube), “Nils [Koppen, sports director] knows exactly the positions we have to strengthen and we are working every day. That response does not offer any direct indication over Engels, but it does show West Ham are actively working on additions as the window moves on. For Celtic, Engels’ future remains one of the major stories to watch over the coming days.