Hearts manager John McGlynn felt Motherwell goalkeeper Darren Randolph was lucky to stay on the pitch during his side's goalless draw at Fir Park.
Randolph caught Callum Paterson with his leg as he collected a high ball in the 13th minute of the Clydesdale Bank Premier League clash.
The Republic of Ireland goalkeeper's right leg moved away from his body and caught the Hearts striker as he ran past, although it was not clear whether that was because his knee had made contact with Paterson in an initial collision.
Referee Crawford Allan was the closest man on the park and did not appear to think about giving a penalty, but the Hearts players angrily accused Randolph.
Neither manager had watched the incident on television before speaking to the media, and the pair had differing initial views of the incident.
McGlynn said: "We thought his foot was in a place where it probably shouldn't have been, to be honest. I don't think the boy was being malicious about it but it could have ended up worse than it actually was. I think he maybe got lucky.
"I haven't seen it again, but that's how I saw it. I think his leg seemed to go in an unnatural position. I think Callum has actually passed the boy's knee. I think it was his trailing foot.
"He had a sore head at half-time and took painkillers."
Motherwell boss Stuart McCall said: "Hand on heart, I've not seen it again. I'm led to believe it could possibly have been a red card. In real time, I thought Daz had come out and collected the ball and they had collided.
"I didn't think there was anything to it. Paterson is a brave boy and he goes in where it hurts. At the time I thought it was just a coming together. I've been told there is a possibility it could have been a penalty kick and a sending-off."