We review stars' international progress.
Steven Fletcher played just over an hour for Scotland as they got off to a winning start under new manager Gordon Strachan.
Charlie Mulgrew’s first-half strike gave the hosts a 1-0 victory in Aberdeen.
John O’Shea captained the Republic of Ireland as they recorded a confidence-boosting victory over Poland.
James McClean also played 81 minutes as goals from Aston Villa’s Ciaran Clark and Norwich City’s Wes Hoolahan secured a 2-0 victory in Dublin.
Seb Larsson played 90 minutes for Sweden as they played out a five-goal thriller with Argentina in Solna.
An own goal from Celtic’s Mikael Lustig gave Argentina an early lead before West Brom’s Jonas Olsson levelled the scores.
The visitors then turned up the heat and goals from Manchester City’s Sergio Aguero and Real Madrid’s Gonzalo Higuain gave Argentina a 3-1 lead inside 25 minutes.
Rasmus Elm scored a late consolation for Larsson’s Sweden, who face O’Shea’s Ireland in a World Cup qualifier in March.
David Vaughan was the only other Sunderland player to feature in Wednesday’s international action.
Vaughan played 45 minutes of Wales’ 2-1 victory over Austria.