Nathaniel Lammons

Nathaniel Lammons (born August 12, 1993) is an American professional tennis player who specializes in doubles. He has been ranked by the ATP as high as world No. 22 in doubles, achieved on 29 January 2024 and a singles ranking of No. 591 achieved on 14 January 2019. He has won seven ATP doubles titles.

A former player at Southern Methodist University, Lammons turned professional in 2016. Lammons sealed his top 100 doubles debut in July 2019, a year in which he won four doubles titles from seven doubles finals reached as he broke through on the ATP Challenger Tour. In 2022, he won his first two career ATP Tour doubles titles in San Diego and Seoul, earning him his top 50 debut. Together with partner Jackson Withrow in 2023, Lammons reached his first ATP 500 final in Acapulco and his first ATP Masters 1000 semifinal in Miami.

2021: New partnership with Withrow, win over world No. 1 doubles team
At the 2021 US Open partnering Jackson Withrow they defeated top pair Nikola Mektić and Mate Pavić in the first round in 75 minutes.

2022: Two titles, top 50 debut
He reached his maiden final at the 2022 Chile Open with André Göransson.

At the 2022 San Diego Open he won his first ATP title with Withrow defeating Jason Kubler and Luke Saville. The pair moved up 25 places to 35th in the doubles race. He made his top 60 debut in the rankings at world No. 55 on 26 September 2022. At the Korea Open he partnered Raven Klaasen to win his second title in two weeks defeating Nicolás Barrientos and Miguel Ángel Reyes-Varela in straight sets. He moved another 7 positions up to reach the top 50 in the doubles rankings at world No. 48 on 3 October 2022.

The pair Lammons/Withrow ended the season at No. 32 in the ATP doubles Rankings.

2023–24: Five titles, Four finals, Masters semifinals, top 25
With Withrow he reached three finals in Auckland, in Dallas and at the ATP 500 Mexican Open in Acapulco. The pair won the Challenger title at the 2023 Arizona Tennis Classic. At the 2023 Miami Open they reached the semifinals of a Masters for the first time but lost to eventual champions Santiago González and Édouard Roger-Vasselin. He made his debut in the top 30 on 8 May 2023.

The pair reached their eight final of the season and second at the ATP 500 level at the 2023 Erste Bank Open in Vienna. At the last Masters of the season in Paris the pair reached the quarterfinals defeating sixth seeds Máximo González and Andrés Molteni.

Lammons and Withrow won their sixth title as a pair at the 2024 Libéma Open defeating top seeds Wesley Koolhof and Nikola Mektić.