Somewhat confusingly, the first of this week’s Champions League semis offers evidence of how deeply entrenched football’s food chain is and, simultaneously, how much it’s been disrupted at the top table this season. That Tottenham Hotspur — who haven’t signed a player in 2018-19 and are at a significant financial disadvantage to at least five other English clubs, let alone Europeans — have made the last four is a significant upsetting of the apple cart in a competition increasingly dominated by a cabal of wealthy European superclubs. That they will face Ajax suggests the cart has been overturned completely, if only temporarily. The Eredivisie leaders are European grandees but have become a club largely concerned with developing, nurturing and selling talent in recent years. Few clubs have been greater beneficiaries of that model than Spurs, for whom ex-Ajax players Christian Eriksen (pictured above), Jan Vertonghen, Davinson Sanchez and Toby Alderweireld are key men. All but Alderweireld arrived in North London directly from Amsterdam. While Vertonghen has enjoyed an excellent European campaign highlighted by a rampaging performance against Borussia Dortmund in the last 16 and Alderweireld has played the most minutes for Mauricio Pochettino’s team this season, it’s Eriksen – the man second on the list of minutes played…