Manchester United midfielder Ander Herrera has a fractured rib, the club announced Tuesday.
Herrera injured himself in United's 2-1 win over West Ham on Saturday and was substituted for in the 74th minute. According to the team, his progress will be monitored over "the next few weeks." He has previously missed United's second and third Premier League games this season due to a different injury.
The 25-year-old was signed by United this summer after he exercised a buyout clause in his contract with Athletic Bilbao, with whom he spent the previous three seasons.
In four appearances for United this season, Herrera has scored two goals. He had seven goals in 94 appearances for Bilbao.
United has been dealing with significant injury problems this season. Nine players were already out for the game against West Ham due to various ailments, a group which included Ashley Young, Michael Carrick, Marouane Fellaini and Jesse Lingard.
Defender Phil Jones, who was also out, is expected back for Sunday's match against Everton, while Fellaini could return soon. Young and Carrick are out for more extended periods.
United will also be without star Wayne Rooney for all of its October matches after Rooney was suspended for kicking at West Ham's Stewart Downing. The captain was sent off for the incident, which occurred in the 59th minute.
Man United is currently tied for seventh in the Premier League standings with eight points through six games.
- Ben Estes