Tennis: Andrey Rublev defaulted from Dubai after allegedly using obscene language in angry tirade

Most of the deciding set was dominated by arguments between Bublik and chair umpire Miriam Bley over the timing of the introduction of new balls.

However, it was Rublev who lost his cool at 6-7 (4/7), 7-6 (7/5), 6-5, yelling towards a line umpire, and getting accused by a different one that the second seed swore at his colleague in Russian.

Rublev insisted he was speaking in English and that he did not use any foul language but the line umpire stuck to his story and the 26-year-old was defaulted from the match.

Bublik tried to convince Bley and ATP supervisor Roland Herfel to continue play but the call was made and the match was over.

The seventh seed now awaits defending champion Daniil Medvedev or French fifth seed Ugo Humbert in the final.

The result also means Bublik has secured his top-20 debut and will become the first Kazakh man to crack the world’s top 20 in the history of the ATP rankings when the new standings are released on Monday.

Rublev found sympathy from Spanish player Alejandro Davidovich Fokina, a quarter-finalist in Dubai, who described the sanction as “shameful”.