Alexander Zverev, of Germany, congratulates Nick Kyrgios, of Australia, on Kyrgios' 6-4, 6-7 (9), 6-3 win during a quarterfinal at the Miami Open tennis tournament, Thursday, March 30, 2017, in Key Biscayne, Fla. (AP Photo/Mario Houben)
Nick Kyrgios, of Australia, returns a shot between his legs to Alexander Zverev, of Germany, during a quarterfinal at the Miami Open tennis tournament, Thursday, March 30, 2017, in Key Biscayne, Fla. (AP Photo/Mario Houben)
Nick Kyrgios, of Australia, reacts after winning a point against Ivo Karlovic during the Miami Open tennis tournament, Monday, March 27, 2017, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)
In this image made from video, tree debris lies on the street as wind gusts in Bowen, eastern Australia, Tuesday, March 28, 2017. A powerful cyclone lashed islands, damaged roofs and cut power on Tuesday as it edged toward Australia's tropical northeast coast, officials said.(AuBC via AP)
In this image made from video, wind gusts outside shops in Bowen, eastern Australia, Tuesday, March 28, 2017. A powerful cyclone lashed islands, damaged roofs and cut power on Tuesday as it edged toward Australia's tropical northeast coast, officials said.(AuBC via AP)
Lucie Safarova, of the Czech Republic, prepares to return a shot to Daria Gavrilova, of Australia, during a tennis match at the Miami Open, Thursday, March 23, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)
Lucie Safarova, of the Czech Republic, returns a shot from Daria Gavrilova, of Australia, during a tennis match at the Miami Open, Thursday, March 23, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)
Nick Kyrgios, of Australia, returns a shot to Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Nick Kyrgios, of Australia, returns a shot against Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Novak Djokovic, of Serbia, reacts after losing a point to Nick Kyrgios, of Australia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Novak Djokovic, of Serbia, returns a shot to Nick Kyrgios, of Australia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Nick Kyrgios, of Australia, celebrates after beating Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
FILE - In this March 20, 2016, file photo, Arnold Palmer, left, congratulates Jason Day, center, of Australia, after Day won the Arnold Palmer Invitational golf tournament in Orlando, Fla. (AP Photo/Phelan M. Ebenhack, File)
United States' Sam Querrey serves to Australia's Nick Kyrgios during a semifinal match of the Mexican Tennis Open in Acapulco, Mexico, Friday, March 3, 2017.(AP Photo/Enric Marti)
Australia's Nick Kyrgios serves to United States' Sam Querrey during a semifinal match of the Mexican Tennis Open in Acapulco, Mexico, Friday, March 3, 2017.(AP Photo/Enric Marti)
United States' Sam Querrey celebrates after beating Australia's Nick Kyrgios during a semifinal match of the Mexican Tennis Open in Acapulco, Mexico, Friday March 3, 2017.(AP Photo/Enric Marti)
Adam Scott, of Australia, tees off on the 17th tee during the first round of the Honda Classic golf tournament, Thursday, Feb. 23, 2017, in Palm Beach Gardens, Fla. (AP Photo/Wilfredo Lee)
Matthew Ebden, of Australia, returns a shot to Nikoloz Basilashvili, of Georgia, in a quarterfinal at the Memphis Open tennis tournament Friday, Feb. 17, 2017, in Memphis, Tenn. (AP Photo/Mark Humphrey)
Nikoloz Basilashvili, of Georgia, returns a shot to Matthew Ebden, of Australia, in a quarterfinal at the Memphis Open tennis tournament Friday, Feb. 17, 2017, in Memphis, Tenn. (AP Photo/Mark Humphrey)
Jason Day, of Australia, follows his chip shot up to the second green of the Pebble Beach Golf Links during the final round of the AT&T Pebble Beach National Pro-Am golf tournament, Sunday, Feb. 12, 2017, in Pebble Beach, Calif. (AP Photo/Eric Risberg)