Coventry manager Iain Dowie criticised Michael Mifsud after the Malta international was sent off as the Sky Blues lost 4-0 at home to West Brom.
"It was the right decision," said Dowie. "It was a silly challenge from Michael - end of story.
"It was a factor in our defeat. We did terrifically well in the first half and were probably the better side.
"But we gave away a sloppy first goal and then you're up against it against a side who move the ball very well."
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