![MASON, OH - AUGUST 14: Serena Williams serves to Petra Kvitova of Czech Republic during the Western & Southern Open at Lindner Family Tennis Center on August 14, 2018 in Mason, Ohio. Matthew Stockman/Getty Images/AFP
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Serena Williams is a six-time US Open champion but has downplayed her chances at this year's tournament. AFP
Serena Williams is a six-time US Open champion but has downplayed her chances at this year's tournament. AFP
Serena Williams the surprise favourite as Novak Djokovic aims to keep the good times going: US Open talking points
The fourth and final grand slam of the season begins on Monday in New York