Don't worry Helen you'll get there - it would be easier to see if we'd been able to get daily results up like we normally do - because we're playing against each other, an early loss for a big percentage pick (eg Berdych in round one) doesn't make a difference that round (no one gets a point so comparatively nothing changes) it becomes about how far you had him to go. So for Nadal, anyone picking him to win is scuppered, they have lost points for every round left where Nadal can no longer win them anything (so for rd 3 - champion that's 3+4+5+6+7). They therefore have to switch their allegiance to the lowest percentage pick in each subsequent match (which are shown on the % picks page: http://www.britishtennis.net/pickem/2012wmpa.htm?n=1), ie Rosol in rd3 and now either Kohlschreiber or Baker (no one thought either of them would get that far) as that way the fewest number of people win points you haven't won, thus your comparative totals suffer the least damage.

So for me, because I've already lost Tipsy from my quarter finalists, I'll be cheering for Istomin come Monday as a win for him gives nobody else any points either.

Sorry that's turned into quite a long explanation. I hope it's still helpful!!