One thing that you often hear before or during a match is how often the home team has won on a particular ground, or how a player has performed. In my opinion, all of these statistics are of absolutely no relevance to the match in question. If someone played on a ground 2 or 3 years ago and did well, it doesn't mean that they will do the same thing when they play on the same ground. If they do play well it is by 1. their consistency or 2. coincidence. Also if a team has won on a ground previously, doesn't mean they will again, a prime example could be the Karachi test that is currently going on. If Pakistan lose this match, which is very possible, (50/50 at the moment) then it will go against their record of only losing once at the National Stadium. So I think that ground statistics in most instances should be scrapped.