Nick Kyrgios completely lost the plot as his fine run at the Miami Open came to an abrupt halt in a straight-sets defeat to Jannik Sinner in the fourth round. The fiery Australian became embroiled in an ongoing verbal battle with both himself and chair umpire Carlos Bernardes that completely undermined his performance in what was initially a tight encounter. In contrast, Sinner remained ice cool and fully focused to book a place in the quarter-finals with a 7-6(3) 6-3 victory. Reflecting on how he avoided being distracted by the circus at the other end of the net, Sinner told Amazon Prime: “I just tried to stay in the present moment. I know that he can raise his level immediately, especially when he breaks. At 4-3 (in the second set) if I serve worse there, he can get back into the match. I tried to stay calm somehow and think I’ve done a great job today. He continued: “Today, I raised my level a bit. I tried to play a bit more aggressive. The conditions are a bit easier, it’s not as windy. I tried to stay close to the lines. I also served well in important moments. It can give me a lot of confidence for the next round.” Kyrgios was evidently frustrated by the missed opportunities and began to vent in trademark style. First up, he criticised the speed of the court, suggesting it was much slower than on Stadium where he had comfortably seen off Andrey Rublev and Fabio Fognini in his previous matches. "It’s completely different," vented Kyrgios. "You think anyone is going tell the players that it’s completely different before the event starts or 'hey guys, just to let you know, centre court is completely different to the Grandstand for some odd reason'. May as well be grass and clay. What a joke." #kyrgiosmeltdown #kyrgios #miamiopen