Townsend said Glasgow have the lowest penalty count of any team in the Pro12 and felt Haupeakui’s first yellow was unjust.
“Langi’s first was a clear tackle. He goes low and puts his arms around, so why that wasn’t checked by the TMO for such an important decision ... The final one, I understand what the referee is thinking. It was a big impact and he wasn’t able to get his arms around but obviously it is a disappointing debut for Langi, who was trying to get involved in attack and defence.”