mauricio pochettino returns to former side southampton for the first time since leaving last summer .
the tottenham boss done an excellent job during his 16 month spell .
the argentine manager has adopted the same methods at spurs as he did during his time at st mary 's .
pochettino blooded the likes of calum chambers and james ward-prowse while at southampton , and has done the same with harry kane at spurs .
his passing and pressing philosophy has taken a while for his new set of players to adjust to , though .