Arsenal have just thrown a spanner in the works for Crystal Palace on transfer deadline day. The Gunners and the Eagles have already been in discussions this week as a £30m deal for Eddie Nketiah is on the verge of completion. Now – however – Arsenal have caused a bit of a headache for Crystal Palace… Arsenal cause Crystal Palace to miss out on Mark TraversA story from The Athletic claimed that Crystal Palace wanted to sign Mark Travers from Bournemouth as a replacement for Sam Johnstone. In case you missed it, the England international is heading to Wolves after a £10m fee was agreed – with t…