Villa captain Chester represented Wales during the international break.
Roberts has impressed at Leeds when given the chance by Marcelo Bielsa.
Williams was loaned out by Everton in the summer to Stoke City.
John left Rangers after Steven Gerrard signed two new left-backs.
Dummett has struggled at Newcastle with a hamstring injury.
At almost every World Cup there is a dark horse, a team who no-one is really talking about and suddenly they come along and enjoy great success.
Wales look good in the post-Coleman era, while the former national team boss is struggling badly at Sunderland.
Swansea full-back Connor Roberts can't wait to work alongside his role model Ben Davies after the Tottenham star's rise to prominence in North London.
Sunderland are edging closer to relegation following yet another loss, and some fans are wondering why manager Chris Coleman ever took up the job.
Newcastle's Paul Dummett told Ryan Giggs he did not feel it was the right time to return to the national set up and explained he wants to focus on his club's relegation battle.
Federalism has support from different people and parties across the country, but what could a Federal UK look like?
The UK government believes it is on the brink of a deal to ends months of deadlock with the Scottish and Welsh governments over an alleged “power grab” after Brexit.
Ryan Giggs sought the advice of Sir Alex Ferguson before agreeing to succeed Chris Coleman as Wales manager, with the former Manchester United winger confident he can secure a first World Cup qualification since 1958 in his first permanent managerial appointment.