Connections have announced that Sea Of Class has sadly died after failing to overcome colic in recent weeks.
The star of the 2018 campaign was retired earlier this month after contracting colic this season.
Trainer William Haggas revealed that her life was at risk but he assured fans that surgery had gone well.
However, he did warn that the four-year-old was still in grave danger and so it proved as the team decided to put her to sleep on Monday.
Haggas admits he and his team are devastated by the news but he claims they will remember her as the best filly they have ever worked with.
He told the Racing Post: "The reason for colic surgery on Sea Of Class in the first place was to remove an abdominal mass sitting between the spleen and liver which had intertwined with her gut. That mass was removed and some of the gut taken out.
"However the mass turned out to be a malignant tumour known as a lymphoma. Her surgeon Richard Payne and specialist Celia Marr warned us that lymphoma's can be aggressive and so it proved.
"She was quiet and uncomfortable today – and quite weak and the decision to put her to sleep was then taken unanimously by her team of experts, Maureen and I.
"Owner Mrs Tsui has been in full support of all decisions taken and she, her family and advisors are all devastated. For all of us here, we mourn the loss of the best filly we had anything to do with but will cherish the memories for ever."
Article Posted on Monday 22nd July 2019 @ 17.54
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