Year of firsts in eventful 2016 tennis season

Updated 6:05 AM ET, Mon December 5, 2016
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What a year in tennis. It was a season of many memorable firsts ... TOBY MELVILLE/AFP/AFP/Getty Images
Roger Federer ended the season outside the top 10 for the first time since 2001. He also missed a major, the French Open, for the first time since 1999. Cameron Spencer/Getty Images AsiaPac/Getty Images
One of the Swiss' main rivals, Novak Djokovic, became the first man since 1969 to win four consecutive majors when he bagged the French Open in June. MARTIN BUREAU/AFP/AFP/Getty Images
His longtime friend, Andy Murray, became the first man other than Federer, Djokovic or Rafael Nadal to end the season as No. 1 since 2003. Julian Finney/Getty Images
That wasn't all. The Scot became the first tennis player to win back-to-back singles gold medals at the Olympics. Clive Brunskill/Getty Images South America/Getty Images
Angelique Kerber, meanwhile, became the first women's player other than Serena Williams to win two majors in a season since 2007. Cameron Spencer/Getty Images/file
Kerber replaced Williams as the women's No. 1, earning praise from Martina Navratilova and Chris Evert. ROSLAN RAHMAN/AFP/AFP/Getty Images
Maria Sharapova, for the first time since turning pro, dropped out of the rankings. That was because the Russian is serving a drug suspension. ROBYN BECK/AFP/AFP/Getty Images
Argentina won its first Davis Cup title when, led by Juan Martin del Potro, it rallied to beat Croatia 3-2 in the final. Argentina had lost its four previous finals. -/AFP/AFP/Getty Images
The Czech Republic won the Fed Cup title for the fifth time in the last six seasons when it also rallied from 2-1 down to beat France in the final. The Czechs became the most successful team in the competition since the US won seven titles in a row from 1976-82. PATRICK HERTZOG/AFP/AFP/Getty Images