The Aegon Championships has attracted its strongest ever field with 16 of the world's top 30 players due to compete at Queen's Club in June.
World number two and defending champion Andy Murray will have competition from four other top-10 players in Rafael Nadal, Stan Wawrinka, Jo-Wilfried Tsonga and Milos Raonic.
Other stand-out names include former grand slam champions Marin Cilic and Juan Martin Del Potro along with Richard Gasquet, John Isner, Nick Kyrgios, Bernard Tomic and Grigor Dimitrov.
The tournament, which runs from June 13-19, joins the China Open in Beijing in having the strongest field ever for an ATP 500 event.
Murray will hope that is not the only record set as he looks to become the first player to win five titles at the pre-Wimbledon tournament.