BIRMINGHAM, April 4: Jansher Khan, struggling with painful knees in his straight games win over Paul Johnson, admitted after reaching the British Open semi-finals for the ninth time in a row that he had last week considered withdrawing from the famous event.The Pakistani played with restricted movement against an Englishman who was below his best despite holding two game balls in the third game of a 15-11, 15-11, 17-15 defeat.Jansher was grateful for the assistance given by Johnson's variable ball control for the six-times champion cannot be sure how long he will be able to carry his injuries.Johnson missed his chance of applying extended pressure on the holder when he rimmed a ball clinging to the wall at 14-12 in the third game, and then played an untidy ball into the middle to concede a penalty stroke.