Blues coach Pat Lam has questioned whether his team should have been given a penalty instead of his team's 18-19 loss to the Crusaders ending on a charged down drop goal.

Lam says that he will be having another close look at video replays of the match to check whether his team had been hard done by.

The Blues coach said he was happy that his players were offside when the Crusaders were given the penalty that led to first five-eighths Tyler Bleyendaal kicking his team into the lead but not all of the calls that were made in the match.

In particular Lam wants to see if the same level of officiating was imposed on the Crusaders as Piri Weepu attempted his dropped goal in the closing act of the game.

"The whole game, we could hear them (the referees), they were looking at the offside line, you know that was the one area they went for and then that last dropped goal, as it started to take its time, I was starting to think, 'well we'd be better off taking it up now', you could see they were really pushing that (offiside) line.

"That was the penalty we gave away and fair enough to take them to 19-18."

"But that's the calls, we'll just review it and go through the process," Lam told Sportal.

"So it will be interesting to have a look at that and see what they were looking at because the video clearly shows there were a lot of guys offside. "