Fellaini is considered an injury doubt for Belgium's Round of 16 match at the World Cup against the United States on Tuesday due to a groin injury, Manchester United's official web site reports.

Fellaini, who scored in Belgium's win over Algeria in the group stage, does not appear to be in serious danger of missing the match, although countryman Vincent Kompany could very well miss out.

Fellaini came on for Mousa Dembele in the 65th minute and then scored off a header in the 70th minute of Belgium's 2-1 win over Algeria in their opening match of the World Cup on Tuesday.

Fellaini's goal equalized the match for Belgium, who went down 0-1 in the 24th minute thanks to a penalty kick from Sofiane Feghouli. Fellaini is coming off a miserable season at Manchester United, as evidenced by the fact that he scored more goals Tuesday than in 19 Premier League matches this year.

Fellaini, who is struggling with a calf injury, is on track to play Sunday against Everton, the Telegraph reports.

Fellaini has been quite a disappointment for United after coming over in an £27.5 million deal last summer from Everton. He has featured in 20 matches this season, but has yet to find the back of the net after doing so 11 times in Premier League play last season.

Fellaini claimed that the elbow he threw in the Manchester derby that earned him a yellow card was not intentional and was only an effort to protect possession of the ball, reports Sky Sports.

Fellaini's clash with Pablo Zabaleta on Tuesday was criticized heavily following the match, with many pundits claiming the Belgian was lucky to escape with only a yellow card. Fellaini said he moved to protect the ball and Zabaleta ran into his forearm.

Fellaini scored against Ivory Coast on Wednesday to help Belgium to a 2-2 tie.

The tall midfielder tucked home a corner before being substituted out of the friendly match at the half.

Fellaini returned to action to face Crystal Palace on Saturday after being out with wrist and groin injuries.

The midfielder was expected to return in early February from his wrist injury, but suffered a groin problem, which kept him out longer than expected. He started Saturday's match against Crystal Palace.

Fellaini suffered a groin injury during training, and will be forced to sit for at least another week, the Manchester Evening News reports. Manager David Moyes said "Marouane picked up a groin injury in training which will probably rule him out for another week possibly. His wrist injury is much improved, but he just felt his groin after training one day this week. We’ll keep an eye on him for a few days."

Fellaini hasn't played since December 4 thanks to injuries to his back, wrist, and now his groin. He's been a colossal disappointment for the Red Devils, having played only 11 Premier League games this season. Being sidelined for another week means he won't face Fulham on Sunday, nor Arsenal on Wednesday. His next shot after that comes February 22 against Crystal Palace.