An angelic Nick Kyrgios reached his first Grand Slam quarter-final for seven years when he recovered from a slow start to beat steady American Brandon Nakashima in five sets on Wimbledon's Centre Court on Monday.

Greek fourth seed Stefanos Tsitsipas labelled Nick Kyrgios a "bully" with "an evil side" to his character after losing a bad-tempered Wimbledon third-round clash on Saturday.

Nick Kyrgios was a lightning rod for controversy at the U.S. Open this week but the fiery Australian was subdued after a third-round loss on Saturday and walked away quietly from the year's final Grand Slam.

Nick Kyrgios is having a "hard time" with hip and shoulder injuries but the Australian says he has done all he can to be ready for his French Open first round match against German veteran Philipp Kohlschreiber.

Nick Kyrgios suffers a setback in his preparations for the French Open when he is sent packing from the Lyon Open by qualifier Nicolas Kicker.

Nick Kyrgios overcame a shaky start to down Sam Querrey 7-6(4) 6-3 6-4 and send Australia into the Davis Cup semi-finals with a 3-1 victory over the United States in Brisbane on Sunday.

Australia's number two Bernard Tomic will be absent from this week's Davis Cup quarter-finals but the United States will still have a fight on their hands in Brisbane due to the impressive form of Nick Kyrgios, U.S. team captain Jim Courier said.

Roger Federer dramatically fought his way into the Miami Open semi-finals with a 6-2, 3-6, 7-6 (8/6) victory over Czech 10th seed Tomas Berdych on Thursday.

Nick Kyrgios overpowered Novak Djokovic for the second time in as many weeks on Wednesday to book an Indian Wells quarter-final against Roger Federer, who swatted aside old foe Rafael Nadal.

Pat Rafter steps down as Tennis Australia's head of performance, ending his rocky relationship with the country's two polarising stars Nick Kyrgios and Bernard Tomic.

Novak Djokovic and Nick Kyrgios hope the Davis Cup heals the wounds of their painful Australian Open exits this weekend when they will be the only two men in the top 15 taking part.

Nick Kyrgios struggled to deal with the furore over his shock second round meltdown at the Australian Open but said the return to a team environment with Davis Cup had helped him through it.

Troubled Australian tennis star Nick Kyrgios indicates he will play fewer tournaments in 2017 after his meltdown at the Shanghai Masters saw him slapped with an eight-week ban.

Australia's Nick Kyrgios is booed off court in a tanking row at the Shanghai Masters as Rafael Nadal crashes out and Andy Murray motors into round three.

A tearful Nick Kyrgios, a dark horse to win the US Open, retires from his third-round match against Ukraine's Illya Marchenko with a hip injury.

Tennis star Nick Kyrgios has threatened to quit his sport so many times the throw away declarations barely raise the eyebrows

Australian Olympic officials name their tennis line-up for Rio on Monday with the nation's top male stars Nick Kyrgios and Bernard Tomic notably absent.

Rafael Nadal faces a battle to qualify for the Rio Olympics after the International Tennis Federation announced the entry list for the 2016 Games.

Williams, Murray and Wawrinka go through to the second round at Wimbledon while Nick Kyrgios has yet another fallout with the chair umpire.

Fiery Australian tennis star Nick Kyrgios pulls out of the Rio Olympics, blaming "unwarranted attacks" on him by Australian Olympic chiefs after he was warned to behave.