Martins Indi is fit to face Arsenal at The Emirates this weekend, but only after X-rays revealed his cheekbone wasn't fracture after the Dutch international was caught by Barnes last Saturday.
“I'm not about getting players into trouble," said Hughes. “I didn't make a song and dance of it after the game because I hadn't at that point seen the challenge.
“But having seen it since, I thought there was clearly intent there and I was very surprised that it wasn't picked up."
He added: “Maybe it just got lost. But that shouldn't happen. I think I saw ex-referees on the Monday morning explaining it away by saying it was unintentional. They clearly haven't played the game because I took a completely different view, as most of the guys connected with the club did."