For the European nations, this international period marks the start of their qualifying campaigns for Euro 2020 but there are other fixtures taking place across the globe. Here is a list of players selected for their countries:
BELGIUM: Romelu Lukaku missed United's Emirates FA Cup tie at Wolves with a foot injury but is still being assessed by his country's medical team. The striker must be considered a doubt for the home game against Russia on Thursday, with a visit to Cyprus on Sunday to follow, also in the European Championship qualifiers.
ECUADOR: United club captain, Antonio Valencia has been included in the squad for Ecuador’s friendly games against USA and Honduras, despite his recent injury lay-off, as they continue to prepare for this summer’s Copa America in Brazil.