Ipswich could once again be without goalkeepers David Stockdale and Richard Wright against the Hornets.
Arran Lee-Barrett became the third Town goalkeeper to start in as many games when they were thrashed 4-0 by Burnley on Tuesday, and he will play again should Stockdale and Wright miss out.
The duo are both struggling with shoulder injuries. Stockdale, on loan from Fulham, is considered the most likely to return having missed the Tractor Boys' last two games.
Ipswich's defence could be boosted by the return of centre-back Ibrahima Sonko.
In his absence, Jewell's side have conceded 13 goals in their last four outings but he has trained all week after tearing his hamstring.
Captain Grant Leadbitter (groin) is still sidelined.
Watford will once again wait on the fitness of top scorer Marvin Sordell when they travel to Suffolk.
The England Under-21 international striker, who has bagged six goals in all competitions this season, was rated as 50/50 for the 2-2 draw with Bristol City on Tuesday night but was missing with an ankle injury as the Hornets squandered a two-goal lead.
Should he miss out once more, Craig Beattie, on loan from Swansea, will start in attack after scoring his first goal for the club against the Robins.
Defender Lloyd Doyley (thigh), centre-back Martin Taylor (dislocated collarbone) and midfielder Stephen McGinn (knee) all remain sidelined.
Goalkeeper Scott Loach was at fault for Bristol City's equaliser but should retain his place although Jonathan Bond could make the bench after being recalled from his loan spell with Forest Green.