Roger Federer aims to make history in Rotterdam this week by surpassing Rafael Nadal to regain the world No. 1 ranking to become the oldest man in ATP history to hold the top spot.

The second-ranked Swiss has a major supporter in his quest—fellow Wimbledon champion Garbiñe Muguruza.

Watch: Muguruza, Kvitova Deliver in Doha

The former No. 1 is rooting for a rivalry duel at the top.

"I think everybody wants to Roger to be number one," Muguruza told the media in Doha after her opening win over Ying-Ying Duan. "We would love if one week is Roger and the next week is Rafa because for me those are the two most players I watch and follow.

"We’ll see. They're going to be fighting (for the top spot) the whole year, I guess."

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