"We're so disappointed that it didn't count because for me it's an easy decision," said the Liverpool boss.
"I'm not going to keep going on about officials because it's been happening to us all season.
"The ball's in the air for a long time, the official's just looking across the line so he's clearly onside and when Coates heads it Luis is minimum level and it's a wonderful finish.
"He should have had a hat-trick and it would have been a brilliant win for us."
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