His tennis IQ isn't the highest. But I don't think he did particularly bad in the Sinner match. He didn't rush things and didn't ball bash, I also think he served good spots and didn't let Sinner go for return winners in his own service games. He was trying to move Sinner left and right but Sinner in his own service games in the 5th set just kept ball bashing 1st or 2nd shot after serve - the majority went in so he was able to take it to the TB. Khachanov stayed focused in the TB, sticked to his tactics and didn't give Sinner a look in his service points. Was OK tactically this time.