Alexis Sanchez, winger/”striker”: £30 million. Calum Chambers, right back/centre back/defensive midfielder: £16 million. David Ospina, goalkeeper: £3 million. Mathieu Debuchy, right back: £12 million. In total, Arsene Wenger has spent £61 million this transfer window alone. Here’s the sad part: it may not be enough to put up a successful league title challenge this season.…