Coventry City top the League Two table with a 100% record from two matches after their 2-0 win at Grimsby Town.
City took the lead trough a Marc McNulty goal with Jack Grimmer heading home a second fifteen minutes from time.
Grimsby Town boss Russell Slade, the former City manager was less than happy with the goal scored by McNulty and he told the Press Association: "It was a tight game all afternoon and there weren't too many chances for either side.
"It was a war of attrition across the middle of the park in many ways.
"We received a free-kick inside our half, Clarkey (Nathan Clarke) has just given it back to Macca (James McKeown) to take the free-kick, and the referee hadn't blown his whistle but deemed that the ball was back in play.
"Clearly from a professional or a fair play point of view, that's all he was doing, passing it back to our goalkeeper to take the free-kick.
"He hadn't blown the whistle - I'm not sure he has to, but certainly there should be a little bit of common sense.
"It is what it is, these things happen, we've made a mistake. From there on is a learning curve for us on where we need to be better in terms of getting back on the front foot."
If you have not seen the goal that Slade is talking about, you can make your mind up by clicking on http://www.skysports.com/watch/video/sports/football/10985977/grimsby-0-2-coventry
Coventry City manager Mark Robins said: "I think we will grow as a team.
"We grew into that game and, for the last 10 minutes of the first-half, we were on top. We didn't really want the half to finish.
"You could sense a goal coming, and it was a relief when one came.
"We started to pick things up, and perhaps could have scored twice before the goal. We might have also had a penalty when Jodi (Jones) went down.
"He did fantastically well against both full-backs. As a team, we started to grow into it.
"For the goal, Marc McNulty was brighter than anyone else on the pitch, and that is what we want.
"There was a furore around the goal, but what we saw was Nathan Clarke put his hand on the ball, and that was deemed as though he has taken the free-kick.
"Grimsby were incensed by it, but we didn't see what was wrong."