10 Unbelievable Times Batman Beat Superman
10. Batman/Superman Annual #1
Bottom of the list, since neither party were fighting all that seriously, but it still counts.
In this annual issue of Batman/Superman, the duo find themselves at the mercy of a gladiatorial arena where they are ordered to fight to the death. Now, obviously the two aren't actually going to do this, but in order to buy time until one of them can think of something, they at least try to make it convincing.
Thus we see that, in terms of raw fighting ability, all else being equal, Batman will come out on top. Granted, the conclusion is nothing decisive, ultimately keeping it from being further up the list, but the way the fight was going at the time showed Batman distinctly at an advantage, so I'm willing to call it for the Caped Crusader in this scenario.
Also keeping it from getting any higher is the simple fact that Superman wasn't fighting seriously, so it's hard to truly gauge how well this would've gone for Bruce otherwise.