"He was very fortunate because there was a stamp on David Jones that the referee didn't see," Martinez said.
"That wasn't the sign of a top player. He was fortunate today. He was lucky.
"It wasn't a nasty game, a bad game. But when you see the replay it is a clear stamp. It could have been a red card if the referee had seen it. But I am not one to look back."
Suarez's brace made him the first player to reach double figures in the Premier League this season.