Andy Murray is set to play Roger Federer at around 3.30pm on Friday, July 10, in what could become a classic Wimbledon semi-final.
Those wanting to watch the match can do so on the big screens in Canada Square Park.
But you may have to sneak out of work early, as play is expected to start some time between 3.30pm and 5pm.
While Murray is the slight favourite with the bookies, Federer has been in monstrously good form at the tournament so far.
The veteran has lost just 48 of his 145 games – dealing with all five of his opponents in under eight hours of play.
The other semi-final, Novak Djokovic v Marin Cilic, will be shown around 1pm.