Coventry City have held Leyton Orient to a 0-0 half-time scoreline at the Matchroom Stadium in League One.
The encounter threw up its first talking point midway through the first half.
Orient appealed for a penalty after Chris Dagnall's flick-on header was thought to have been handled by Cyrus Christie in the area, only for the referee to wave away the claims.
Kevin Lisbie spurned the best chance of the first 45 minutes by heading narrowly wide of the target from Dean Cox's teasing cross.