Zian Flemming sends a free-kick just past the post as the home side look to open the scoring.
Watford's Keinan Davis - on loan from Aston Villa - has a goal disallowed for a foul on Coventry defender Kyle McFadzean in the build up.
Robins goalkeeper Max O'Leary is called into action to make a great stop to deny Riley McGree and he also keeps out an effort from Marcus Forss.
Nahki Wells then nods wide at the other end.
Another goal looks likely - but for who?
Nathan Jones is forced into an early change.