Second-half strikes by Federico Valverde, Brahim Diaz and Endrick gave feeble Real Madrid an unconvincing 3-0 win over lowly Real Valladolid.
A list of high-profile tennis players and other sportspeople who called time on their careers at a young age.
The world number three will play in the final against Italy in September despite an initial threat from her coach that she would boycott the squad.
Having been at the receiving end in the final in 2011 and 2013, Li Na, on her third attempt, will hope to become the first player from Asia to win the Australian Open, a tournament that is billed as the Grand Slam of the Asia Pacific.
Justine Henin lost her drive for success after reconciling with her estranged family, her coach said following her decision to retire.
With more and more players seeking early retirement, the packed tennis schedules have once again come under the scanner.
The Belgian is emerging from months of struggle against a debilitating virus.
China's two-time Grand Slam champion Li Na is poised to retire. State media CCTV-5, quoting unnamed insiders, said the 32-year-old tennis ace will announce her decision to quit the game on Friday.
A summary of sports events and sports persons, who made news on Wednesday
Serena Williams capped off a season to remember by capturing her fourth WTA Championship title with a 2-6, 6-3, 6-0 win over Li Na on Sunday.
China's Li Na allowed herself a small smile of satisfaction after she advanced to her fourth Australian Open semi-final on Tuesday, mindful that an inquisition from coach Carlos Rodriguez earlier in the tournament had helped her get there.
China's Li Na overcame an attack of nerves and weathered a feisty challenge from Dominika Cibulkova before roaring to a 7-6 (7-3), 6-0 victory to win her first Australian Open title on Saturday.
China's Li Na will meet Serena Williams in the final of the WTA championships after beating Czech Petra Kvitova 6-4, 6-2 on Saturday, becoming the highest-ranked player ever from an Asian country.