Hammers resigned to Sakho's extended stay on the sidelines
West Ham striker Diafra Sakho appears unlikely to play again this season.
The Senegal international has been sidelined since he suffered a back injury in November which required surgery.
Sakho is now back in light training but West Ham medics say he will need a lengthy period of building up his fitness.
Head of medical and sports science Stijn Vandenbroucke said: "We must be mindful that Diaf is essentially at the start of his own personal pre-season training schedule.
"When players return from their off-season, they will go through four to five weeks of pre-season work to build up their strength and fitness and, after undergoing back surgery and three months of rehab, a player needs time to reach sufficient fitness levels before we can contemplate making him available for selection in the Premier League."
Sakho missed the first three months of the season through injury and managed just two appearances for the Hammers before succumbing to the back problem.