Frances Tiafoe apologizes to referee insulted following defeat against Safiullin

Will this be enough in the eyes of the ATP? The American Frances Tiafoe (17th in the world) in any case apologized on Tuesday, on social networks, after copiously insulting the referee following his defeat in the 3rd round of the Masters 1000 in Shanghai against the Russian Roman Safiullin (5-7, 7-5, 7-6 [5]).