Channel 4 has thanked John McCririck for his years of racing broadcasting, but confirmed it will "vigorously" fight the claim he was dropped because of his age.
A statement was released ahead of the tribunal opening in central London.
– Channel 4 spokesman
We are grateful to John McCririck for his contribution towards Channel 4 Racing over many years.
However we reject the suggestion that discrimination on the basis of age played any part in the decision not to include John in the Channel 4 Racing team from 2013 and we are vigorously defending this claim.