Nick Kyrgios fumes at Miami Open courts and umpire during Jannik Sinner clash

Nick Kyrgios took aim at Miami Open organisers during the changeover in his round-of-16 match against Jannik Sinner as he claimed the Grandstand court was completely different to the main Stadium court. The world No 102 is playing his first match on Grandstand this week against the ninth seed, and went on to slam umpire Carlos Bernardes when his walky-talkie went off mid-point.

Kyrgios is facing Sinner for the first time in their respective careers. The pair were set to do battle in the last-16 at Indian Wells last week but the Italian was forced to withdraw with illness, though both men have given themselves a second chance to meet in the Miami last-16.

The match marks the Aussie's first on the Grandstand court, the second-biggest court at the tournament, after playing his first three rounds on the Hard Rock Stadium. After five games on the second court, Kyrgios shared his annoyance with the difference between Stadium. "It's completely different. You think anyone is gonna tell the players that it's completely different before the event starts or? Hey guys, just to let you know," he said, sitting down at 2-3 on serve.

Continuing his muttering, the world No 102 suggested organisers warn players of the differences, comparing them to grass and clay courts. "Can I have an umbrella or...?" he asked, before adding: "Just to let you know guys, centre court is completely different to the grandstand for some odd reason. May as well be grass and clay. What a joke."

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The six-time title winner then continue to rant after chair umpire Carlos Bernardes' walky-talkie went off loudly into his microphone mid point while Sinner was serving at 4-4. The world No