Quite genuinely, I am sorry for the Southamptons of this world - the days of Matt le Tisseur (who was derided at the time for desiring to spend his career at a club he loved) are long over - they nurture, develop, encourage - a footballer, only for him to develop a fit of the monument sulks (as van Dijk has done - what a lack of pride and loyalty and decency and professionalism) and refuse to play - once others, bigger, better, richer, - signal interest and make clear that they wish to come in for him.....
In no way do I blame Southampton for having to sell off their best assets - they did well to smack Liverpool on the wrist last summer when they initially tried to tap van Dijk - and seeking to obtain the best price for this asset - that takes economic sense, as the "asset" does not wish to remain and behaves like a spoiled brat.
Unfortunately, this is the dilemma of clubs at that level, irrespective of how well managed they are - and Southampton are a decent and well run club, one that I have long wished well; it says something for them and their values that Matt le Tisseur wished to pass his entire career (happily) with them, rather than move (that word "ambition" again) elsewhere.