If you watch enough of LD, you should know that messing around is one of his trade-marks. I still remember that in one of the Korean Open Finals against LCW, LD had the match well in hand and suddenly shut down and lost the match. There are many other examples. In this particular case, LD was likely just to save himself for another day. LD is still recovering from injury and not in form to challenge a highly motivated CL who happens to be the best badminton player at the moment.