Midfielder Corry Evans has had the furthest to travel as he is with the Northern Ireland squad for their final two qualifiers.
First up this evening is a match in Baku to take on Azerbaijan, before they move onto Israel next Tuesday.
The Irish can't qualify for the finals in Brazil but they could finish a creditable 3rd if they are successful on their travels.
Joshua King has injury concerns ahead of Norway's vital two matches as they bid to make the finals next summer.
The Rovers flier has a slight thigh injury and may not feature this evening for the Norwegians as they take on Slovenia in Maribor. However he could play a part in their final group match at home to Iceland on Tuesday.
Norway are currently fourth, but with just three points separating four teams in the group, there is plenty of opportunities for them to join Switzerland for the chance to qualify for the finals.
A groin injury has prevented Jordan Rhodes joining up with his Scotland team-mates for their match against Croatia at Hampden next Tuesday. Grant Hanley is with the squad as they prepare for their final World Cup qualifier.
At Under-21 level, Anthony O'Connor, who last week joined League Two side Torquay United on loan, is with the Republic of Ireland squad who face Romania in Piatra Neamt for their UEFA U21 Championships qualifier this evening.