Southampton are gearing up for their Championship play-off final against Leeds United but in the background, Russell Martin is ironing out plans for next season. Russell Martin’s Southampton are one game away from reaching the Premier League. Widely dubbed the ‘most expensive game’ in football, the Saints will take on Leeds in their all-black strip hoping to return to the top flight. The South Coasters hold a psychological edge over their opponents having beaten them twice in the league, claiming victory at Elland Road on the final day of the season. All eyes will be on whether Southampton can…