South was declarer in 5♥X doubled
Tricks went:
7♠, A, 2, 3♣
K♥, 4, 2,9
6♥, Q, A, J
5♣, A, 7, 2
6♣, K, 4, 2♦
K♦, 9, 3, 6
At this point declarer lead the 3♦ and when north showed out, showed his hand and said I have to give you two diamonds. Defenders put their hands away, as did declarer, when Dummy points out that declarer only has to give up 1 diamond.
Director is called at this point. How do you rule?