Verb
(intransitive, especially of an animal, chiefly UK) To escape into a burrow, hole, etc. when being hunted.
The fox escaped from the hounds by going to ground.
(idiomatic, by extension, chiefly UK) To hide from public view or sequester oneself, especially when authorities, members of the news media, or others are looking for one.
(intransitive) To fall on the floor
Source: en.wiktionary.org“We dive in, go to ground, against an experienced striker in David Goodwillie, who’s one of the best in the league. Source: Internet
As soon as you go to ground, you give yourself a problem. Source: Internet