Serbian, Novak Djokovic won his first singles' grand slam title at
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2008- Australian Open
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2007- US Open
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2006- French Open
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2007- Australian Open
A
Correct answer
Explanation
Novak Djokovic won his first Grand Slam singles title at the 2008 Australian Open, defeating Jo-Wilfried Tsonga in the final. This was a breakthrough moment in his career. He did not win any of the other listed Grand Slam events in 2006-2007 - his first major came specifically at the 2008 Australian Open, which launched him into the elite tier of tennis players alongside Federer and Nadal.