Denis Shapovalov vs Busta Carreno Busta prediction

Shapovalov is the most popular young tennis player at the moment. He made the semi final in his hometown after beaten Del Potro ( played bad) , Nadal and Mannarino. Than, he had to play 3 qualification matches to reach main level. He passed Medveded and Tsonga in 3 sets but I'm not sure how 18 years old child will keep his mental/physical fitness at the US Open. It's his 3rd Grand Slam in his life, has no victory apart from US Open at the moment. Busta is not an elite player but he is playing at Grand Slams since 2013. He is good at slow conditions, surprisingly conditions at US Open are also slow. Busta came to R16 after 3 easy victories in 3 sets, no fatigue. Busta is also better when we consider long match endurance and keep cool under supporter pressure. Busta has won 6 of last 7 games on hard court against left handed players. At every angle, I see Busta has edge for serve,breaks, experience, fitness... I think this match is the end of story for Denis.