While much of men's tennis has been focused this week on Madrid and the new-format Davis Cup Finals, Roger Federer and Alexander Zverev have been taking top-tier tennis to Latin America, for their #VivaLatAmTour.

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Federer, Zverev face
off in Argentina
with special guests

Federer, Zverev face off in Argentina with special guests

Getty Images

So far, they've played in Santiago, Chile, on Tuesday, and Buenos Aires, Argentina, on Wednesday, in front of large crowds and special guests ...

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Including Marcelo Melo and the always-popular Juan Martin del Potro.

Of course, Federer and Zverev are also fan favorites on their own.

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So much so that getting an autograph might require some engineering and ingenuity.

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The pair has three more cities scheduled this week: Bogota, Colombia, on Friday, Mexico City, on Saturday, and Quito, Ecuador, on Sunday.