Well, the safest way to keep him at bay, and the whole barca team - play 11 men behind the ball when they have it. When we're attacking, give the ball to our playmaker (Cech) and hoof it up to Drogba. Yeah, I can definitely see that working. In all seriousness though, it will be the most interesting set of matches tactically by far. You don't meet teams in England who play without a striker. When a team has an assigned striker through the middle, then there are always certain basics you have to do defensively, but a dynamic front 3 has its own challenges. For example, when aerial ability plays a major part in day to day English matches, then this time our defense will need to work twice as hard on ground level. It will be interesting to see how we approach that, the zonal marking setup and all. The most important issue probably is to avoid having them rolling the ball around our box and combining with eachother, pressing aggressively and effectively once they reach that area will be vital. Easier said than done, because a small lapse in concentration leaving too much free space, we'll be riding our luck (which with barca is always near unexistent).