Shoulder injury sidelines Boulahrouz.

Chelsea FC have lost another defender ahead of Wednesday's UEFA Champions League meeting with FC Porto after the versatile Khalid Boulahrouz damaged a shoulder in Saturday's 4-0 win against Norwich City FC in the English FA Cup fifth round.

Dislocated shoulder

The 25-year-old Dutch international was making his return from six weeks out with an ankle ligament injury but failed to make it to half-time at Stamford Bridge after being hurt while defending a corner. "Boulahrouz has dislocated his shoulder," said Chelsea manager José Mourinho, "and will be out for quite a time." The English champions are already without first-choice left-back Ashley Cole while John Terry has only recently returned from a back injury.