Liverpool manager Juergen Klopp spoke of his frustration at Brexit’s impact on English football, with the German concerned that tough new transfer rules being implemented on January 1 are a negative consequence of Britain leaving the European Union (EU).

Premier League clubs will not be allowed to sign players from EU countries without a work permit while foreign players under the age of 18 cannot be signed at all as part of post-Brexit regulations.

“I am still waiting for the first advantage of Brexit that someone can tell me,” Klopp said in comments published in the Guardian on Friday. “What really improves after Brexit?”