Nathaniel Lammons

Nathaniel Lammons (born August 12, 1993) is an American professional tennis player who specializes in doubles. He has a career-high ATP ranking of world No. 17 in doubles, achieved on 27 January 2025. He has won 10 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. In 2024, he made his first Grand Slam semifinal at the 2024 US Open with Withrow and reached the top 20.

At the 2021 US Open partnering Jackson Withrow they defeated top pair Nikola Mektić and Mate Pavić in the first round in 75 minutes.

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.

In the beginning of 2023 with Withrow, Lammons 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.

During the American summer swing, in the span of two months Lammons and Withrow won three titles at the 2023 Atlanta Open, the 2023 Hall of Fame Open and the 2023 Winston-Salem Open.