From The Boeing FCTM:
Touchdown In Crab
The aircraft can land using crab only (zero side slip) up to the landing crosswind limit speeds. On dry runways, upon touchdown the aircraft tracks toward the upwind edge of the runway while de-crabbing to align with the runway. Immediate upwind aileron is needed to ensure that the wings remain level while rudder is needed to track the runway centreline. The greater the amount of crab at touchdown, the larger the lateral deviation from the point of touchdown. For this reason, touchdown in a crab only condition is not recommended when landing on a dry runway in strong crosswinds.
On very slippery runways, landing the aircraft using crab only reduces drift toward the downwind side at touchdown and permits rapid operation of spoilers and autobrakes, because the main gear touchdown simultaneously. This may reduce pilot workload since the aircraft does not have to be de-crabbed before touchdown. However, proper rudder and upwind aileron must be applied after touchdown to ensure that directional control is maintained.