Coventry & Luton share drab goalless drawCoventry City, the team with the Championship's leakiest defence, made it six games unbeaten as they held Luton Town to a goalless draw at St Andrew's.
The Sky Blues and Hatters managed just two shots on target between them - but both sides seemed happy to settle for a point.
Luton had lost their last two away games and, for Coventry, it was a third clean sheet to enjoy for Sky Blues boss Mark Robins in that six-game run.
Coventry came closest to breaking the deadlock in the first half when Callum O'Hare neatly set up Tyler Walker, who hit the post with an effort from a tight angle.
But Luton went close too when top scorer James Collins headed Harry Cornick's cross just wide.
The Hatters are now unbeaten in their last four league meetings with Coventry, having previously had a desperate record against them.
And, after successive beatings in south Wales in their previous two games at Cardiff and Swansea, Luton's first clean sheet on the road since 26 October was a good response by Nathan Jones' Hatters.
Coventry now head this Saturday to Wycombe, with whom they were promoted last season, looking for a throwback to last season's 4-1 Matt Godden-inspired away win.
Sky Blues manager Mark Robins told BBC CWR:
"We struggled to find the energy. We didn't make any changes from Saturday and we were just a little bit lacking.
"We didn't keep the ball well enough and couldn't find that little but of inspiration and width.
"It's not a big squad. We have limited options. But, in the end, I'll settle for a point and a clean sheet and we're six games unbeaten now."