Russell Martin has provided the update Southampton fans have been waiting for on the pursuit of Celtic midfielder Matt O’Riley. Southampton have been busy in the transfer window this summer, with Russell Martin making eight first-team signings. They have spent over £55 million in the process in a bid to assemble a squad capable of staying in the Premier League this season. However, the two big fees within that total – £18 million and £20 million – have been for Flynn Downes and Taylor Harwood-Bellis; both of whom were at the club last season. With that in mind, you could argue over whether Sou…