The BMO Field grounds crew had some fun at the expense of its Montreal counterparts Wednesday, sending out a tweet showing a measuring tape and a white line on a grass field.

44 yards... 132 feet... <a href="https://twitter.com/torontofc">@torontofc</a> <a href="https://twitter.com/impactmontreal">@impactmontreal</a> <a href="https://twitter.com/MLS">@MLS</a> "measure twice, paint once". <a href="https://t.co/B0HEvHeJhK">pic.twitter.com/B0HEvHeJhK</a> —@TFC_GroundsDept

The good-natured jab was in response to the botched penalty line markings at Olympic Stadium which delayed the start of Game 1 of the MLS Eastern Conference final between the two Canadian rivals last week.

61004 people are watching paint dry at the Big-O right now... <a href="https://twitter.com/hashtag/IMFC?src=hash">#IMFC</a> <a href="https://twitter.com/hashtag/TFC?src=hash">#TFC</a> <a href="https://twitter.com/hashtag/MLSCupPlayoffs?src=hash">#MLSCupPlayoffs</a> <a href="https://t.co/S6Dl0hdYuV">pic.twitter.com/S6Dl0hdYuV</a> —@DGelevan

After the players exited the field following their warmup, workers taped over the sidelines of the box and started measuring as a game official watched. It appeared the box was a metre or so short on each side.

An Impact executive later apologized, blaming the blunder on human error.

TFC defeated the Impact 5-2 on Wednesday night and 7-5 on aggregate to become the first Canadian team to advance to the MLS Cup final.

Toronto will host the Seattle Sounders on Dec. 10.