Emyr Huws missed the 11th-minute penalty which would have levelled the game at 1-1 had Frank Fielding not saved, after appearing to step in ahead of Nahki Wells, last season’s main taker.
A hamstring problem forced Huws off soon after, and head coach Wagner said had he know about the Welsh midfielder’s injury, he would not have given him the nod for the penalty.
“Emyr had a problem with his hamstring, so bad that we had to make the change. I think he had this problem before he took the penalty, but I didn’t know,” said Wagner.
“I wasn’t sure Nahki wanted to take it after being fouled. I told Emyr to take it, so at that moment, we had a communication problem. If I knew about the injury, he would not have taken it.
“However, this wasn’t the biggest problem. It is a problem we missed the penalty, but after it we had plenty of minutes and enough chances to score. It was a big moment, but not the only one.”