Jackson Withrow (born July 7, 1993) is an American professional tennis player who specializes in doubles. Withrow has a career-high ATP doubles ranking of world No. 16 achieved on 19 February 2024. Withrow has won 10 ATP doubles titles.
Withrow and Sock made a doubles run to the title at the 2018 Delray Beach Open, first defeating Leander Paes and Purav Raja in the first round. Next the pair upset the Bryan brothers in the quarterfinals in 3 sets, then won their next match to set up a finals match against Nicholas Monroe and John-Patrick Smith. Withrow and Sock prevailed in three sets to win the tournament, marking Withrow's first ever ATP tour-level title as well as his first doubles title.
At the 2022 San Diego Open he won his first ATP title as a team with Lammons.[6][7] The pair moved up 25 places to 35th in the doubles race.[8] He made his top 50 debut in the rankings on 26 September 2022.
The pair Withrow/Lammons ended the season at No. 32 in the ATP doubles rankings.[9]
2023–24: Eight titles, Major and Masters semifinals, top 20
Withrow reached the top 25 on 16 October 2023. The pair reached their eight final for 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.[12]
They successfully defended their Atlanta title making them the last champions at the tournament.[14] The pair captured their first ATP 500 title at the 2024 Mubadala Citi DC Open in Washington D.C.[15] They also successfully defended their Winston-Salem Open title, making it the fourth team title for the season.[16] At the US Open Withrow reached the semifinals of a Grand Slam for the first time in his career, partnering Lammons, with wins over three-time defending champions Joe Salisbury and Rajeev Ram[17] and 13th seeds Wesley Koolhof and Nikola Mektić.[18] They lost to eventual champions Max Purcell and Jordan Thompson in straight sets.[19] At the 2024 Shanghai Masters, they reached the quarterfinals but lost to Wesley Koolhof and Nikola Mektić which halted their attempt to move one position up above their opponents in the ATP doubles race from their current place of No. 9.[20]
Doubles performance timeline
Key
W
F
SF
QF
#R
RR
Q#
P#
DNQ
A
Z#
PO
G
S
B
NMS
NTI
P
NH
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.
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United States 
