Wing Daniel James starred for Swansea in the Championship last season but has joined Manchester United
Last season saw Cardiff City relegated after one season in the Premier League and Neil Warnock's side must now refocus on life in the Championship.
The Bluebirds will be in the division alongside near rivals Swansea City, who themselves are still adjusting after their relegation from the top flight in 2017-18 and have their sixth new permanent manager in three seasons.
For League Two Newport County and National League Wrexham last season was a case of near-misses, with both reaching the play-offs but ultimately missing out on promotion.
Preparations are already underway for the new campaign, so here is BBC Sport Wales' guide to the pre-season friendlies of the four Welsh clubs.
Sat, 29 June
Cefn Druids 0-4 Wrexham
Fri, 5 July
Taffs Well 1-5 Cardiff City
Fleetwood Town 1-0 Wrexham
Tue, 9 July
Portimonense SC 1-0 Wrexham
Thurs, 11 July
Al Ahly 1-1 Newport County
Sat, 13 July
AFC Telford United 0-2 Wrexham
Sun, 14 July
Tues, 16 July
Undy AFC 2-4 Newport County
Wed, 17 July
Shrewsbury Town 0-1 Newport County
Wrexham 1-3 Stoke
Fri, 19 July
Bath City 1-1 Newport County
New Mexico United 1-1 Cardiff City
Sat, 20 July
Curzon Ashton 0-2 Wrexham
Sun, 21 July
Real Valladolid 1-1 (2-4 pens) Cardiff City (Edmonton, Canada)
Mon, 22 July
Weston-super-Mare 1-8 Newport County
Tue, 23 July
Wed, 24 July
Newport County 1-6 Chelsea U23s
Sat, 27 July
Wrexham 0-1 Crewe
*Fixtures and kick-off times subject to change
