I guess it’s a huge mental block/obstacle to overcome two best players in the world in best of five in consecutive days. Nadal winning the first set is probably a seal in his twelfth win at RG. Not sure Thiem has the mental tank capacity to battle this out for a win. Physically he looks ok. He should take things slow and can’t stand that far back from the baseline.
not easy for a one hander to deal with that topspin. try throwing a tennis ball-size rock in a backhand motion starting with your arm elevated up around your ears over and over again. that's what it's like to hit that kind of topspin.
there's a reason the only people to beat him at the french have had spectacular 2-handers that allowed them to take the ball on the rise and hug the baseline.