The striker's fitness has been of some concern over the past fortnight.

Lukaku suffered an ankle injury prior to the international break against Crystal Palace.

While he went away with Belgium, the 24-year-old trained alone last week.

United have kept in contact over Lukaku's condition ahead of their crunch Premier League showdown at Liverpool on Saturday (12.30pm).

And as Martinez's side went into last night's game at home to Cyprus having already secured World Cup qualification, Lukaku could have been rested.

But The Times say Mourinho was dismayed to see Martinez bring the United hitman on and risk a setback.

Lukaku was introduced in the 66th minute when Belgium were already 3-0 up.

The Red Devils forward found the net during his cameo in the 4-0 victory.

Despite Martinez having declared Lukaku was fit to feature against Cyprus, The Times add Mourinho was still left unhappy.

It appears, though, Manchester United's top scorer this season should now be available for the trip to Anfield.

Lukaku and Mourinho have three days to prepare for the Liverpool contest.

And the United manager could be even more reliant on Lukaku's fitness with Marcus Rashford a doubt to start after picking up a knock while away with England.