Ahead of one of the biggest stops on the road to Roland Garros, the stars of the ATP and WTA have hit the ground running in Madrid.

Former runner-up Victoria Azarenka confirmed her attendance at the Premier Mandatory event by flying to the Spanish capital with her son Leo.

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Maria Sharapova is riding a four-match losing streak but the 2014 Madrid champion is a powerhouse on clay. She's been working hard on the clay of the Caja Mágica since her opening round loss in Stuttgart.

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Indian Wells winner Naomi Osaka will attempt to repeat her hard-court success on red clay.

Two-time defending champion Simona Halep is "back in business" after suffering a quarterfinal exit to CoCo Vandeweghe in Stuttgart.

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One of Spain’s biggest home hopes, Garbine Muguruza, will be looking for her first trophy in Madrid. After winning Monterrey, the world No. 3 seemed back on track but she retired after just one set in Stuttgart.

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Rejuvenated and rested following a month off after an incredible month of March, Juan Martin del Potro is heading into his first tournament of the clay-court season.

Denis Shapovalov and local star Fernando Verdasco as well as 2019 tournament director Feliciano Lopez are also all in town gearing up for the ATP Masters 1000.

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Main-draw action at the Mutua Madrid Open begins this weekend with a loaded group of WTA first round matches before the men start on Monday.