was expected that Stradivarius would go straight to the British Champions Long Distance Cup, but Gosden opted to give him a run in the Doncaster Cup on 13 September. Following the late withdrawal of Dee Ex Bee he went off at odds of 1/9, with the best-fancied of his four opponents being the seven-year-old Barsanti. He recorded his tenth consecutive win as he took the lead a furlong out and won easily by one and three quarter lengths from Cleonte. His success made him the seventh horse after Isonomy, Alycidon, Souepi, Le Moss, Longboat and Double Trigger to win the Stayers' Triple Crown. On 19 October Stradivarius attempted to win his eleventh consecutive race as he ran for the third time in the British Champions Long Distance Cup and went off the 8/13 favourite. The closing stages saw Stradivarius and the four-year-old Kew Gardens draw away from the field and although the favourite gained a narrow lead a furlong out, his younger rival rallied in the final strides to win by a nose. On 12 November Stradivarius was named Champion Stayer at the Cartier Awards, taking honour for the second time. In the 2019 World's Best Racehorse Rankings Stradivarius was given a rating of 122, making him the nineteenth best horse in the world, and the best over extended distances. 2020: six-year-old season The 2020 flat racing season in England was disrupted by the COVID-19 Pandemic. Stradivarius began his campaign in the Coronation Cup which was run that year at Newmarket on 5 June, and saw him racing over one and a half miles for the first time in three years. He was in contention for most of the way before being outpaced in the last quarter mile and came home third behind Ghaiyyath and Anthony Van Dyck. Gosden commented "That was absolutely perfect and what we expected... he hasn’t run for a very long time. He'll have needed that today as he's a bigger horse again. He's six years old and he's fully developed in every sense. He's bigger and rounder and you could notice that in the paddock". At Royal Ascot on 18 June Stradivarius attempted to become the third horse after Sagaro and Yeats to win a third consecutive Ascot Gold Cup and was made the 4/5 favourite ahead of seven opponents including Technician, Cross Counter, Moonlight Spirit (Prix de Lutèce), Nayef Road (Sagaro Stakes), Prince of