he played below his average because LJK did not allow him to play at all. Even in his top form, with such a performace by LJK ML would still lose.
in this match LJK played great in somepoints but made tons of unforced errors even when he had the initiative adding the fact that the two toned ball made some difference it makes sense that ML got destroyed like that in the last two sets in the semifinal
In the match above LJK still flipped/killed many of ML serves but with lower success ratio, so its probably the ball that made a difference but also in the first match LJK was too impatient with his strokes .
to be accurate the combination of both LJK better performance boosted by the fact that he could see the exact spin on the ball. In the first match above the score is 3-0 for ma long so I found it hard to believe that only the two toned ball made all the difference. LJK simply did not allow ML to play his game in the semifinal. He was superior in serve receive and in the 3rd ball, ma long does not play TT by himself
You can understand better whan im saying if you compare the 2nd set where ML destroys LJK and in the next and last two sets, LJK flip kills almost everything. ma long was just using his normal game plan, he has specific variations and in the end LJK adapted better than him in the game