Southampton are now eyeing up a move for an ‘exciting’ Portuguese attacker who played Champions League football for his club last season. In preparations for the Premier League, it appears Russell Martin is building from back to front at Southampton. Four of the five players signed so far have been defensive options, including Taylor Harwood-Bellis, Nathan Wood, Ronnie Edwards and Charlie Taylor. The only midfield or forward player recruited by Martin has been Adam Lallana, so the Saints must do a lot of work in the market before their squad is ready to tackle the top flight. There have been s…