Someone's put a 50 million private bet on Federer. Seeing as this event should have been closed 6 hours ago, and the match has already finished, it is possible that they placed that bet after the match was completed. I think that this event should be abandoned because of this. Or if the vBookie staff are able to see who and when the bet was placed, it should be settled. At the present moment, there are 4 people who have put public bets on Federer - shantanu_rooney, deathrevenge9, Abhas and p.o.l. These were the same 4 people that I saw had bet when I checked a few hours ago and pm-ed West Indian to settle/close this event. I can't remember if the private bet was there back then however.
If anyone bets after this post it'll be easy to tell because there are only 5 bets on Federer at the moment, and I have listed 4 of those people.