Southampton are keen to address the forward positions before the summer transfer window slams shut on August 30. Southampton discovered a new-found defensive solidity right when it mattered as they dug deep to concede just once across their three play-off matches to secure promotion. Despite that, the backline was clearly Russell Martin‘s priority to address this summer ahead of the Premier League with five defenders signed. Now, the focus looks to be shifting to the final third, with an attacking midfielder, winger and striker the priorities. Ben Brereton Diaz is the latest of eight summer ar…