By Jon Lees The first horse to win the world’s richest horse race is set to be disqualified after a lengthy investigation. Maximum Security, trained by Jason Servis in the US, won the inaugural edition of the Saudi Cup, which was worth £16 million in Riyadh in 2020. He won the dirt race in the colours of Michael Tabor, one of the Coolmore partners who bought into the horse prior to the event. Although Maximum Security won the race, beating Midnight Bisou by three quarters of a length, the £7.5 million first prize-money was never paid out. This was because, just weeks after his return home, Ser…