Guido Pella (Spanish pronunciation: [ˈɡiðo ˈpela];[2] born 17 May 1990) is an Argentine former professional tennis player.

[9] Entering as a qualifier, he reached the semifinals of the French Open boys' singles in 2008, upsetting first-seeded Bernard Tomic in the quarterfinals (and losing to Jerzy Janowicz).

His first Challenger final came at Guayaquil, Ecuador in November 2011, losing the match to Matteo Viola in straight sets.

[10] In August, he won his first hard-court tournament at the Manta Challenger, beating Maximiliano Estévez in the final.

In the US Open, he made it through the qualifying stage of the tournament, beating Lukáš Rosol to reach his first Grand Slam main-draw match, which he lost to Nikolay Davydenko in four sets.

Guido Pella entered the 2013 Australian Open main draw directly, but he lost in the first round to qualifier Amir Weintraub.

The following week, he played at the Brasil Open, winning his first ATP World Tour-level match against sixth seed Fabio Fognini,[14] losing then in the second round to eventual finalist David Nalbandian.

Pella reached his fourth ATP Tour final in Córdoba Open in February, but lost to compatriot Juan Ignacio Londero in three sets.

[15] At the 2019 Mutua Madrid Open he reached the semifinals of a Masters 1000 for the first time, partnering João Sousa where they lost to Dominic Thiem and Diego Schwartzman.

Following his successful runs at the Canada and Cincinnati Masters of third and second round respectively on his debut, he reached a career-high in singles of World No.

At the 2023 Wimbledon Championships he defeated 13th seed Borna Ćorić and qualifier Harold Mayot to reach the third round.

[20][21] Only main-draw results in ATP Tour, Grand Slam tournaments, Davis Cup/ATP Cup/Laver Cup and Olympic Games are included in win–loss records.