Southampton have been handed a major transfer boost in pursuit of one of their key summer targets. Southampton will have to be hard at work in this summer’s transfer window if they’re to beat the drop in the Premier League next season. Russell Martin’s side are returning at the first time of asking after beating Leeds United 1-0 in the Championship play-off final last month. Already there’s a growing list of names being linked with summer moves to St Mary’s, with Martin seemingly wasting no time in readying his side for a tough Premier League campaign. There’s also a lot of players potentially…