Tomorrow, Foursquare may just shatter its ‘check-ins at once’ record…by about 40,000.

Foursquare, the location based check-in start-up, is doing an incredible job at making itself known in all circles. I’m genuinely impressed.

This time, it’s football (soccer to you Americans) and the company has partnered with Umbro, a sports clothing manufacturer, to bring Foursquare to the sporting masses.

A post on the company blog is urging fans attending the Manchester City vs Tottenham match on Wednesday to use Foursquare to check in.

It’s a really cool new toy to play with, and we want to see if we make a little bit of history at Eastlands on Wednesday night. We want to create the biggest number of people all checking in the same place that Foursquare has seen so far. The biggest total up to now is only a few hundred people, so with 48,000 crammed into the City Of Manchester Stadium, we should be in with a great chance of breaking the record.

Now, the chance of all 48,000 fans reading that blog post is slim to none but who knows how else they’re promoting it. Even if just a few thousand people run with it in the space of two hours, it’s a record breaker – almost certainly for a number of check-ins per hour.

The current record for a day is 275,000 check-ins a day, broken during SXSW (which had around 12,000 attendees). I wonder if a few football hooligans, sorry I mean fans, can help shatter that records. That is, if it can stay up.