Marcos Giron faces Daniel Merida Aguilar in Phoenix Challenger opener

American Giron favored against Spanish underdog Merida Aguilar in first-round matchup

Published on Mar. 10, 2026

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World No. 69 Marcos Giron of the United States will take on World No. 139 Daniel Merida Aguilar of Spain in the first round of the Phoenix Challenger on Tuesday. This will be the first career meeting between the two players. Giron enters the match as the favorite, having compiled an 8-6 record so far in 2026, while Merida Aguilar is 11-4 on the year.

Why it matters

The Phoenix Challenger is an important stop on the ATP Challenger Tour, providing lower-ranked players an opportunity to earn ranking points and prize money. A strong performance here could help boost Giron or Merida Aguilar up the ATP rankings.

The details

Giron, the higher-ranked and more experienced player, will look to use his power game and strong serve to overwhelm the Spaniard. Merida Aguilar will need to rely on his clay-court skills and consistency to pull off the upset. The winner of this match will advance to the second round of the Phoenix Challenger.

  • The match is scheduled for Tuesday, March 10, 2026 at 7:00 pm local time.

The players

Marcos Giron

A 27-year-old American player currently ranked No. 69 in the world. Giron has an 8-6 record so far in 2026 and is seeking to build on his career-high ranking of No. 37.

Daniel Merida Aguilar

A 24-year-old Spanish player currently ranked No. 139 in the world. Merida Aguilar has an 11-4 record in 2026 and is looking to continue his climb up the ATP rankings.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident (San Francisco Chronicle)

The takeaway

This first-round matchup at the Phoenix Challenger features an intriguing clash of styles, with the power and experience of Marcos Giron going up against the clay-court skills and consistency of Daniel Merida Aguilar. The outcome could have implications for both players' rankings and future prospects on the ATP Tour.