Spain's Rafael Nadal celebrates after his match against Australia's Nick Kyrgios in Australian Open Fourth Round at Melbourne Park, Melbourne, Australia, January 27, 2020. Rafa Nadal suffered his first lost set of the tournament but rode out a challenge from a wholly committed Nick Kyrgios to move into the quarter-finals of the Australian Open for the 12th time with a 6-3 3-6 7-6(6) 7-6(4) victory. REUTERS/Edgar Su

Spain's Rafael Nadal in action during his match against Australia's Nick Kyrgios in Australian Open Fourth Round at Melbourne Park, Melbourne, Australia, January 27, 2020. REUTERS/Edgar Su

Spain's Rafael Nadal in action during his match against Australia's Nick Kyrgios in Australian Open Fourth Round at Melbourne Park, Melbourne, Australia, January 27, 2020. REUTERS/Hannah Mckay

Spain's Rafael Nadal in action during his match against Australia's Nick Kyrgios in Australian Open Fourth Round at Melbourne Park, Melbourne, Australia, January 27, 2020. REUTERS/Edgar Su

Spain's Rafael Nadal celebrates after his match against Australia's Nick Kyrgios in Australian Open Fourth Round at Melbourne Park, Melbourne, Australia, January 27, 2020. REUTERS/Edgar Su