Italy thrashed minnows Liechtenstein 5-0 to stay level on points with Spain, who won 2-1 in Macedonia.
Republic of Ireland suffered their first defeat at the Aviva Stadium in three years as Iceland claimed a 1-0 victory in Tuesday's friendly.
Robbie Brady will captain the Republic of Ireland in their friendly against Iceland at the Aviva Stadium on Tuesday.
Croatia maintained their three-point lead atop Group I thanks to a 1-0 victory over Ukraine in Zagreb.
The Republic of Ireland take on Wales in a crucial World Cup Qualifier on Friday, with Spain and Italy also in action - all live on Sky Sports.
Jon Dadi Bodvarsson on Wolves, why Iceland left Euro 2016 with some regrets, and the team-talk that geared them up to beat England.