Caroline Wozniacki of Denmark laughs as she gets her hair wrapped around her racket during a practice session at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 14 January 2018. The Australian Open starts on 15 January. EPA-EFE/MAST IRHAMScotland’s Andy Murray hits the ball during a practice session ahead of the Australian Open in Melbourne, Australia, 13 January 2008. The Grand Slam tennis tournament, featuring defending champions Roger Federer and Serena Williams, kicks off in the city on 14 January. EPA/JULIAN ABRAM WAINWRIGHTUS player Serena Williams adjusts her hair during her third-round match against Swiss player Emmanuelle Gagliardi at the All England Tennis Championships in Wimbledon on Friday, 29 June 2001. EPA PHOTO/MARTYN HAYHOWRafael Nadal of Spain shakes out his hair after defeating James Blake of the U.S during the Pacific Life Open tennis tournament in Indian Wells, California, USA 20 March 2008. Nadal defeated Blake in three sets 7-5, 3-6, 6-3. EPA/JOHN G. MABANGLOA detail of the hair of Robin Montgomery of the USA as she serves during her fifth round match against Olivia Gadecki of Australia during day ten of the Australian Open tennis tournament in Melbourne, Wednesday, January 29, 2020. EPA-EFE/SCOTT BARBOUR Argentinian Marcelo Charpentier, hair dyed in one of the Wimbledon colors, in action against French Cedric Pioline on 24 June at the 1997 Wimbledon Championships. Pioline won the match 5-7, 6-3, 7-5, and 6-2.WTA Commonwealth Bank Tournament of Champions winner Ana Ivanovic from Serbia wears Balinese traditional costume as she poses for media with her winner’s trophy in Nusa Dua, Bali, Indonesia on 07 November 2010. EPA/MADE NAGIThe hair of Roger Federer of Switzerland rises above his headband during play against Ivo Karlovic of Croatia in their third-round match at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 20 January 2012. EPA/BARBARA WALTONPolish tennis player Agnieszka Radwanska posing as she has her hair done in the player beauty bar at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 21 January 2013. EPA/FIONA HAMILTON / TENNIS AUSTRALIADustin Brown of Germany in action during his first-round match against Joao Sousa of Portugal at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 15 January 2018. EPA-EFE/LUKAS COCHA man with a haircut looking like a tennis ball is seen before the women’s singles final match for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 06 July 2013. EPA/Friso Gentsch