West Ham United are preparing an offer worth up to £25 million ($31.3 million) for Bournemouth’s Callum Wilson after it was confirmed Diafra Sakho will miss up to six weeks with a thigh injury.

Wilson has emerged as Slaven Bilic’s main priority in the January transfer window after a poor start to the season that has left West Ham just one point clear of the relegation zone. 

Bournemouth rejected an offer of around £15 million from West Ham in May.

West Ham have been scouting Wilson since his 20 goals helped Bournemouth to promotion from the Championship in 2015.