Andrey Rublev defaulted from Dubai after angry tirade.

ATP Supervisor Roland Herfel (left) disqualifies Andrey Rublev during his semi-final match with Alex

World No 5 insisted he was speaking in English and that he did not use any foul language.

Dubai: Russia’s Andrey Rublev was defaulted from the Dubai ATP tournament for allegedly using obscene language in an angry tirade at a line umpire on Friday, gifting Alexander Bublik a place in the final.

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

However, it was world No 5 Rublev who lost his cool at 6-7 (4/7), 7-6 (7/5), 6-5, yelling towards the official, who claimed the second seed swore at him in Russian.

No foul language

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 fought back from 0-3 down in the first set and played a solid tiebreak to take the lead in 50 minutes, surviving 17 winners off of Bublik’s racquet.

The second set followed a similar pattern, with Bublik claiming an early break of serve but failing to maintain his advantage as Rublev forced a tiebreak.

This time though, the big-serving Kazakh snatched the last four points of the breaker to take the semi-final into a decider.

Unsportsmanlike conduct

Bublik, who came into the match with an 8-0 record in deciding sets this season, dropped serve in the opening game of the final set, and got into a lengthy argument with Bley about the timing of new balls coming into play.

He also received a code violation for unsportsmanlike conduct for using obscene language in anger after getting broken.

Despite continuing to debate the issue with Bley during changeovers, Bublik managed to break back on a horrendous overhead miss from Rublev, who had seven break point opportunities to extend his lead over his opponent but couldn’t convert and the set was suddenly even at 4-all.