Watford striker Marvin Sordell is pushing for a starting place alongside Danny Graham up front.
Defender Lloyd Doyley is out with a calf injury suffered in training last week, so the on-loan Andrew Taylor will continue at left-back.
MATCH PREVIEW
Denied a first home win by an injury-time goal for the second time this season, Malky Mackay's Watford face a Bristol City side who are fresh from their first victory of the campaign.
City's 2-0 success at Scunthorpe was a major boost for the club following a rocky few weeks, and they will now want to give their home fans a win to cheer after conceding a total of six goals in their first two games at Ashton Gate.
Doncaster's last-gasp equaliser in Saturday's 2-2 draw was a real blow for Watford, who also allowed Coventry to secure an unlikely point in stoppage time at Vicarage Road on the opening day.
The Hornets will want to atone for their latest lapse and ensure City goalkeeper David James has an unhappy meeting with the club he started his career at. James, 40, made his Watford debut almost exactly 20 years ago.
MATCH FACTS
Head-to-head
• The last three meetings between these clubs at Ashton Gate have been drawn, and Watford have not lost there for 17 years.
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• City have won only one of their last five matches against Watford.
Bristol City
• City have conceded more goals at home this season than any other team in the Championship.
• Jon Stead is set to make his 200th league start, while David Clarkson could make his 250th appearance in English and Scottish league football.
Watford
• Watford are without a win in four games, and four of their six points this season have been secured away from home.
• They have scored four Championship goals in the last 10 minutes - more than any other club.
Source: BBC Sport
Source: BBC Sport