Tiger Roll had the chance to make history on Saturday and become only the second horse after Red Rum to win the Grand National three times - so why is he running at Aintree on Thursday?The decision not to run Tiger Roll in the Grand National itself was made by the horse's owner Michael O'Leary, who argued his two-time winner was given an unfair weight by the handicapper.Remarkably, Tiger Roll, who won back-to-back editions in 2018 and 2019, was initially entered into the race, meaning a record-breaking tilt at a third National had been on the cards.But Ryanair boss O'Leary withdrew his superstar horse at a recent declaration stage following a row with BHA handicapper Martin Greenwood.Greenwood allotted Tiger Roll a weight of 11 stone and 9.
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