KJ Choi knew he was destined for a 'special round' even before completing an outstanding six-under-par 64 to move into the lead at the midway point of the AT&T National in Pennsylvania. Choi managed an unexceptional 69 in his opening round, but was in inspired form on Friday as he matched the course record with four straight birdies on the opening nine setting him on his way. He made the turn in 30 and, although he bogeyed the 11th, back-to-back birdies on the 15th and 16th ensured he finished his round in top spot on seven under. Choi, who won The Players Championship earlier this year, said: 'I didn't know, nor did anybody tell me [I was on target for the course record]. 'But