2021 Queen's Club Championships

The 2021 Queen's Club Championships (also known as the cinch Championships for sponsorship reasons) was a tennis tournament played on outdoor grass courts at the Queen's Club in London, United Kingdom from 14 to 20 June 2021. It was the 118th edition of the event and part of the ATP Tour 500 series of the 2021 ATP Tour.

Singles

 * 🇮🇹 Matteo Berrettini defeated 🇬🇧 Cameron Norrie, 6–4, 6–7(5–7), 6–3

Doubles

 * 🇫🇷 Pierre-Hugues Herbert / 🇫🇷 Nicolas Mahut defeated 🇺🇸 Reilly Opelka / 🇦🇺 John Peers, 6–4, 7–5.

Wheelchair singles

 * 🇬🇧 Gordon Reid defeated 🇦🇷 Gustavo Fernández, 6–2, 6–2

Wheelchair doubles

 * 🇧🇪 Joachim Gérard / 🇸🇪 Stefan Olsson defeated Tom Egberink / 🇦🇷 Gustavo Fernández, 1–6, 7–6(7–4), [10–6]

Prize money

 * per team

Seeds

 * 1 Rankings are as of May 24, 2021.

Other entrants
The following players received wildcards into the main draw:
 * 🇬🇧 Liam Broady
 * 🇬🇧 Jack Draper
 * 🇬🇧 Andy Murray

The following player received entry using a protected ranking:
 * Lu Yen-hsun

The following players received entry from the qualifying draw:
 * 🇺🇦 Illya Marchenko
 * 🇦🇹 Sebastian Ofner
 * 🇷🇸 Viktor Troicki
 * 🇦🇺 Aleksandar Vukic

The following player received entry as a lucky loser:
 * Alejandro Tabilo

Withdrawals

 * Before the tournament
 * 🇪🇸 Alejandro Davidovich Fokina → replaced by 🇫🇷 Jérémy Chardy
 * 🇨🇦 Milos Raonic → replaced by 🇺🇸 Frances Tiafoe
 * 🇷🇸 Filip Krajinović → replaced by Alejandro Tabilo
 * 🇦🇷 Diego Schwartzman → replaced by 🇦🇺 Alexei Popyrin
 * Stan Wawrinka → replaced by 🇪🇸 Feliciano López

Seeds

 * 1 Rankings are as of May 31, 2021.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇬🇧 Liam Broady / 🇬🇧 Ryan Peniston
 * 🇬🇧 Alastair Gray / 🇫🇮 Harri Heliövaara
 * 🇬🇧 Stuart Parker / 🇬🇧 James Ward

The following pair received entry as an alternate:
 * 🇦🇺 John Millman / 🇳🇿 Artem Sitak

Withdrawals

 * Before the tournament
 * Marcelo Arévalo / Matwé Middelkoop → replaced by  Matwé Middelkoop / 🇦🇺 John-Patrick Smith
 * 🇰🇿 Alexander Bublik / 🇺🇸 Taylor Fritz → replaced by 🇰🇿 Alexander Bublik / 🇺🇸 Nicholas Monroe
 * 🇪🇸 Alejandro Davidovich Fokina / 🇪🇸 Albert Ramos Viñolas → replaced by Aljaž Bedene / 🇪🇸 Albert Ramos Viñolas
 * 🇧🇬 Grigor Dimitrov / 🇪🇸 Feliciano López → replaced by 🇪🇸 Feliciano López / 🇮🇹 Jannik Sinner
 * 🇷🇸 Laslo Đere / 🇷🇸 Filip Krajinović → replaced by 🇦🇺 John Millman / 🇳🇿 Artem Sitak
 * 🇫🇮 Henri Kontinen / 🇫🇷 Édouard Roger-Vasselin → replaced by 🇬🇧 Luke Bambridge / 🇬🇧 Dominic Inglot