In 2017 Serena Williams won a Grand Slam title despite what challenge?

Serena Jameka Williams (born September 26, 1981) is an American inactive professional tennis player. Considered among the greatest tennis players of all time, she was ranked world No. 1 in singles by the Women's Tennis Association (WTA) for 319 weeks, including a joint-record 186 consecutive weeks, and finished as the year-end No. 1 five times. She won 23 Grand Slam singles titles, the most by any player in the Open Era, and the second-most of all time.

Serena Williams defeated her sister Venus Williams in the final, 6–4, 6–4 to win the women's singles tennis title at the 2017 Australian Open. It was her seventh Australian Open singles title and her 23rd major singles title overall, surpassing Steffi Graf as the Open Era leader in women's singles major titles. Serena won the title without losing a set during the tournament. This marked the first time the Williams sisters contested a major final since the 2009 Wimbledon Championships, and the first time they contested the Australian Open final since 2003. With the win, Serena also regained the world No. 1 singles ranking. Serena was roughly 8-weeks pregnant with her first daughter, Alexis Olympia Ohanian Jr., by the end of this tournament. It was Venus' first major final since the 2009 Wimbledon Championships. This was Serena's final grand slam title.