That opens the possibility that Guy Demel will be drafted in alongside James Tomkins and Winston Reid and Aaron Cresswell.
Respected website www.physioroom.com gives the pair a September 20 return date along with Matt Jarvis.
Manager Sam Allardyce is keeping the team a closely guarded secret and we understand has ordered a tight training ground lockdown on all information.
However, we understand the manager has a question mark over Alex Song’s fitness levels and may not start him.
Jarvis is also expected to be sidelined for the match tonight with all three hoping to be ready for the next game against Liverpool at the weekend.
www.physioroom.com were the website which claimed Andy Carroll would return on October 25 and thus it will be interesting to see how accurate their predictions are regarding Jenkinson, O’Brien and Jarvis.
Possible team: Adrian; Demel, Tomkins, Reid, Cresswell, Downing, Noble, Kayoute, Vaz Te, Zarate, Valencia