0 in football, a system of defending in which each player is responsible for defending an area of the pitch rather than an opposing player --
High defense line, offside trap, high pressing, zonal marking.
Besides zonal marking, the defence pressed hard and maintained a high offside line.
Teams playing 4-4-2 usually operate a zonal marking system, but teams playing a sweeper do not.
Also, several other teams rely exclusively on pure zonal marking approaches.
Modern teams have all moved away from man-marking defensive schemes in favor of zonal marking systems.
The biggest advantage of zonal marking is its flexibility.