Southampton have secured the loan signing of Bournemouth midfielder Joe Rothwell until the end of the season. Journalist Mark McAdam confirmed on ‘X’ that the 29-year-old has agreed to join Southampton for the rest of the campaign and the deal is a straight loan with no option or obligation to buy included. The deal has come somewhat out of the blue – with McAdam announcing that Rothwell is undergoing his Southampton medical on Sunday morning – and is a surprise given that Russell Martin said on Friday that Southampton are primarily targeting a right winger to replace Nathan Tella who departed…