The first of many. A 17-year-old Williams beats Martina Hingis at the 1999 US Open in straight sets to win her first major title.
Conquering clay. Serena beats sister Venus at Roland Garros 7-5 6-3 in 2002 to claim her second grand slam at the French Open.
A few weeks later, Serena makes it a hattrick of grand slams with victory over Venus at the Wimbledon final in July 2002.
Serena comes out on top after another final with Venus, beating her sister in straight sets to win her second US Open title in 2002.
A grand slam of grand slams -- the first "Serena Slam." Serena wins a first Australian Open title -- and a fourth major on the trot -- by beating Venus in three sets in 2003.