Cape Town - West Ham were dealt a huge blow with the news that striker Diafra Sakho will be out of action for six weeks.
The Hammers are in the midst of a striker shortage at the moment, with Jonathan Calleri sidelined with a hamstring injury, while Simone Zaza continues to struggle for goals at the club.
Manager Slavan Bilic has been forced to use Michail Antonio and Andre Ayew as stop-gap attackers while Andy Carroll may be forced to come back earlier than expected from his long-injury lay-off.
A brief statement from West Ham on Sakho read: "Hammers striker Diafra Sakho will be out for six weeks after sustaining a thigh injury during Sunday’s draw with Manchester United.
"Sakho scored the opener at Old Trafford with just two minutes on the clock, but was withdrawn in the 66th minute through injury.
"A scan on Tuesday revealed that the injury will keep him out of contention for up to six weeks.
"Everyone at West Ham United wishes him a speedy recovery and quick return to action."