Defender Kieran Tierney revealed the officials had no clear explanation for the 94th-minute penalty that robbed Scotland of a friendly win over Poland.
Arsenal man Tierney had headed Steve Clarke's men into the lead in the second half.
But Krzysztof Piatek went down under the challenge of Craig Gordon before dispatching the last minute penalty to earn a draw in the match hastily arranged for the benefit of the Ukrainian people.
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