Footballers not on international duty this summer will be working hard to ensure they are ready for the beginning of their respective pre-seasons in a matter of weeks. Gone are the days where players would report for pre-season training carrying a few extra pounds and short of fitness, with most footballers working as hard in the off-season as they do during it such is the level of professionalism in the modern game. Southampton only confirmed their place in the Premier League via the play-off final win over Leeds United less than a month ago, but there has been little time to rest ahead of wh…