Barker will make his first appearance in a Derby shirt in Saturday's pre-season friendly against Chesterfield.

BBC: Barker completes switch to Derby

Argentina's Guillermo Canas, currently ranked 16th in the entry system, will make his first appearance on the Queen's Club grass.

BBC: Hewitt heads Queen's Club entries

They are managed by former Yugoslavia international Luka Peruzovic, and are also hoping to make their first appearance at the World Cup finals.

BBC: SPORT | Football | My Club | Wrexham | Lawrence's World Cup mission