An Ellis Simms tap-in sent Coventry City through to the next round of the Carabao Cup as Frank Lampard’s men took control in the second half at the CBS Arena.
The Sky Blues carved out a couple of chances in a lacklustre first half of the first round tie but asserted their authority after the break.
Simms and Kai Andrews had the best of City’s early chances with the big striker seeing his effort loop over the bar and the teenage midfielder have his close range effort headed clear amid appeals for handball against Luton defender Thomas Holmes.
Ben Wilson was called upon to save at his near post to deny a powerful angle drive from Cauley Woodrow in an otherwise dull opening 45.
The Sky Blues, however, came out with a lot more purpose after the break when Haji Wright started a lovely move