Speaking to Grosvenor Sport, the 61-year-old said: "When it comes to Premier League clubs being unsure over signing players from Scotland, I remember being told by Manchester United and Chelsea that Virgil van Dijk made too many mistakes – but that’s because he was bored.
"Can you imagine how different things might have been if David Moyes had signed Virgil van Dijk? He ended up at Southampton and then Liverpool but teams didn’t want to pay the £10 million when he was at Celtic. Big money moves from Scotland to England are rare because teams are sceptical."