Federer warns Kyrgios over work ethic after Shanghai strop

       Nick Kyrgios was involved in an on-going argument with the umpire after the official suggested there was a lack

Kyrgios reacted by saying "I don't care" and told Dumusois "you have no right to tell me that it's poor".

Coric will now face American qualifier Bradley Klahn, who sprung a surprise as he defeated Australia's Kyrgios 4-6 6-4 6-3.

The end of the 2018 season hasn't gone to plan for Nick Kyrgios, with the Australian suffering a first round loss at the Shanghai Masters.

Ranked 104 in the world, Klahn presented few problems for Kyrgios in the first set and he looked on course to take out the match.

Umpire Damien Dumusois questioned the effort of Kyrgios, telling him at one stage early in the second set he was "really borderline", which upset the world No 38 who then continued to verbal the official.

Kyrgios lost five games straight from 4-all in the second set.

He later sarcastically asked Dumusois "was that borderline?" after serving an ace.

While not a clear-as-day accusation of tanking - like some others have freely done in the past - Dumusois' comments clearly didn't go down well with the 23-year-old.

In 2017, he copped a $10,000 fine for unsportsmanlike conduct during a match against American Steve Johnson.

It is the third successive year in which the Australian has gone out of the tournament in controversial fashion.

Last month umpire Mohamed Lahyani was suspended from his next two scheduled tournaments after trying to encourage Kyrgios during a match at the US Open.

De Minaur is ranked one spot ahead of compatriot John Millman as both climbed spots due to Kyrgios' dramatic, 11-place fall.

In 2016, he was booed by the crowd after patting the ball over the net several times during his serves and then walking back to his chair before opponent Mischa Zverev's serve had landed.

The win over Tiafoe has left Ebden facing a tough second round encounter against world No.7 Dominic Thiem. A press conference for the Argentine on Tuesday was cancelled at the last moment, however, which suggests that he could still be unwell.Top seed and holder Federer starts his campaign on Wednesday against Russia's Daniil Medvedev.

The Croatian, 21, won 4-6, 6-4, 6-3 and will play Klahn in the next round.



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