The first competitive grass court event of the summer will feature the likes of Dominic Thiem and Nick Kyrgios when it takes place in Berlin from 13 July.
A three-day tournament featuring six men and women will take place before the same players take part in a hard court event from 17-19 July.
There will be no spectators at Steffi Graf Stadium and electronic line calling will be used instead of judges. (BBC)
