Jose Fonte and Portugal have their fate in their own hands in Group B, knowing victories in Andorra and at home to Edimilson Fernandes in Switzerland will almost certainly seal their place at Russia 2018.
Marko Arnatuovic and Austria face two must-win Group D ties at home to Serbia in Vienna on Friday 6 October and away in Moldova three days later. Austria sit fourth in Group D, five points behind Wales and four behind the Republic of Ireland.
In Africa, Diafra Sakho and Cheikhou Kouyate have been included in the Senegal squad for a World Cup African qualifying Group D fixture in the Cape Verde Islands..
At youth level, Declan Rice and Josh Cullen are in the Republic of Ireland U21 squad for home Group 5 ties with Martin Samuelsen and Norway – who also host Germany in Drammen – and Israel in Dublin.
Domingos Quina and the Portugal U20s travel to Switzerland and host Italy in friendly matches, while Dan Kemp is in the England U19 squad for friendlies in Czech Republic and Slovakia.
Finally, Anthony Scully and the Republic of Ireland U19s host Azerbaijan, Cyprus and Serbia in UEFA European Championship qualifiers.