Thiem is slowly becoming the mental monster.
to be fair its Querrey on clay, your odds are decent of winning points if you just make him play a million balls. Just saying. Thiem was clutch at the end for sure, but Sam hit some bad misses in rallies and likely was fairly tired. I am not confident about Thiem being that clutch at this point. If he plays and beats Nadal tomorrow by being mentally strong in tight moments then that would be a big sign, but against another headcase like Querrey? eh