Cavalier Usman Khawaja relishes magic moment in Karachi
Chances to make Test centuries don’t come around very often. Excellent careers might include five or 10. Each innings starts from nothing and gradually climbs across hours, with every rung gained being the one that might break. However placid the pitch, however rich the vein of form, it only takes one good ball, one mistake, one lapse of concentration, piece of bad luck, umpiring error, fine piece of fielding, and the count collapses back to zero.
