The Old Trafford midfielder was allowed to remain in Manchester on compassionate grounds, with his wife due to give birth shortly.
However, the Brazilian has trained at Carrington in the last couple of days and his progress has quickly been relayed out to Ole Gunnar Solskjaer in the Emirates, where the rest of his Manchester United team-mates have been enjoying a warm weather training camp.
It's understood Fred would like to be involved against Mauricio Pochettino's men at Wembley, having started the last two games under the new boss at the Theatre of Dreams.
The 25-year-old has struggled for the form which persuaded the Red Devils to part with £52m last summer to Shakhtar Donetsk, scoring just once so far.
United insiders have explained they expect the samba star to come good during the remaining months of the campaign, with his family life now settling down in Manchester.