After reaching her first grand slam semi-final in Melbourne, Elise Mertens said "if you believe in yourself, then anything can happen".
World number one Rafael Nadal was forced to retire from his Australian Open quarter-final against Marin Cilic, trailing 2-0 in the fifth.
Andy Murray has been the main man of British tennis for more than 10 years, but Kyle Edmund is currently the star turn at Melbourne Park.
Kyle Edmund claimed the biggest victory of his career on Tuesday and Grigor Dimitrov said: "He deserved to win, simple as that."
Grigor Dimitrov suffered a shock loss to Kyle Edmund in the Australian Open quarter-finals.
A hip injury troubled Elina Svitolina at the Australian Open, where the Ukrainian exited in the quarter-finals.
Mark Philippoussis believes Marin Cilic can cause an upset by beating Rafael Nadal at the Australian Open.
World number 37 Elise Mertens shocked Elina Svitolina in the Australian Open quarter-finals.
After a gruelling third-round win, Simona Halep enjoyed a more serene victory, while Angelique Kerber showed resolve at the Australian Open.
While ruing the elbow injury that contributed to his Australian Open exit, Novak Djokovic retained glowing praise for opponent Hyeon Chung.