A total of 17 matches take place across Europe today, after which the qualifying picture may be a little clearer.
Italy can consolidate top spot in Group B when they travel to Malta, with second-placed Bulgaria facing Denmark.
Germany can move eight points clear in Group C with victory at home to Kazakhstan, while in Group D the Netherlands will look to make it six wins out of six when they host Romania.
Group A is emerging as one of the most tightly-contested sections, with Belgium and Croatia locked together on 13 points. Belgium face Macedonia today and will hope Wales can take points off of Croatia in Cardiff.