We have not lost a league match this season, dropping points only at Stoke with Lukaku leading our charge with seven league goals already.
With Liverpool having not kept a league clean sheet since August, Manchester United have been handed a boost as star striker, Romelu Lukaku has been passed 100% fit for Belgium's final World Cup Qualifier against Cyprus on Tuesday.
Speaking ahead of tonight's qualifier against Cyprus, Martinez said: "Marouane, it has been confirmed that he has got ligament damage".
Mourinho's team face Liverpool at Anfield on Saturday in a lunchtime kickoff before a Champions League trip to Benfica on Wednesday.
He has won the Premier League, FA Cup, League Cup, Europa League and Community Shield while with United, and the 27-year-old lies one appearance short of 250 for the club.
There were initially major fears that Marouane Fellaini would be injured for a lengthy period, perhaps many months.
He may not be a favourite among Manchester United fans, but few now argue with the effectiveness of Marouane Fellaini.
Fellaini proved his worth to Manchester United before the worldwide break by scoring twice during their 4-0 victory over Crystal Palace at Old Trafford.
And Michael Carrick also drove in for training in his silver range rover, after picking up an injury himself.
Fellaini has become a key man in Mourinho's plans this season, and in particularly since an injury to fellow midfielder Paul Pogba, and United could ill afford a lengthy absence for him.
It seems very likely that Ander Herrera will play for Manchester United alongside Nemanja Matic at Anfield on Saturday lunchtime.