Tsitsipas will be going to Boston to join his mates Kyrgios, Medvedev, and Zverev at the Laver Cup.
It is a really tough ask to progress a long way through any Major Tournament, let alone the US Open, if you barely hang on to win your 1st Round match in 5 Sets over 5 hours.
Tsitsi was unlikely to get to the second week after that match against Murray.
Going forward, he needs to shorten the points and do everything to get through the early rounds of Tournaments as quickly as possible. He is not going to win too many matches grinding out long games with his SHBH, especially at tournies like Wimbledon and the US Open.