Watford defender Younes Kaboul is pushing for a starting spot after being on the bench last time out on his return from a hamstring injury.
Right-back Daryl Janmaat faces another month on the sidelines with a shoulder injury.
Bournemouth's Joshua King is still nursing a hamstring injury but has been in light training this week.
Marc Pugh has been making progress with a similar problem but is still a couple of weeks away from a return.
MOTD COMMENTATOR'S NOTES
Steve Wilson: "As Eddie Howe again finds himself talking about the possibility of being an England manager of the future, a visit to Vicarage Road will rake up some unpleasant memories from the past.