Southampton could capture the signing of a Matt O’Riley alternative for a fraction of the price this summer. Manager Russell Martin is keen to strengthen his squad ahead of a return to the Premier League and will be working hard alongside Southampton owners Sport Republic to identify targets. Stuart Armstrong is confirmed to be leaving the club this summer as his contract comes to an end and the 32-year-old needs replacing in the advanced midfield position. 36-year-old veteran Adam Lallana has returned to his first club for free and will go some way to fill the Armstrong void but will need his…