2009 Australian Open – Men's singles final true in the sense that Federer won four majors since this final, but indeed had not beaten Nadal in three subsequent Grand Slam meetings. Federer lost to Nadal once more at the French Open finals in 2011 and Federer lost to Nadal twice more at the Australian Open semifinals in 2012 and 2014. It would not be until the 2017 Australian Open that two would meet again in a Grand Slam final, that time ending in the 35 year-old Federer's five-set victory that claimed his 18th singles major and subsequently set new tennis records from it. Until his 2017 Australian
2017 Australian Open Series not lose a set during the tournament. She also regained the No. 1 ranking, defeating her sister Venus Williams in the final, 6–4, 6–4. This marks the first time the Williams sisters met in a Grand Slam final since the 2009 Wimbledon Championships and the first time they met in the Australian Open final since 2003. Serena's victory was her 23rd Grand Slam title in singles, surpassing Steffi Graf as the all-time leader in Grand Slam titles in the Open era. 2017 Australian Open Series In tennis, the 2017 Australian Open Series, (sometimes known as the 'Australian Summer of Tennis'