Southampton are at risk of making a huge error as they head into the Premier League by neglecting their front line. Russell Martin has seen eight first-team players come in at Southampton this summer but the quality of the starting XI is arguably no better as a result. Defence was clearly the focus at the beginning of the transfer window, with Yukinari Sugawara, Taylor Harwood-Bellis, Ronnie Edwards, Nathan Wood and Charlie Taylor all signed to bolster the defensive ranks. Flynn Downes has arrived permanently after an impressive season on loan, whilst veteran Adam Lallana should provide experi…