Coventry beat 10-man Sheffield Wednesday to move into the third round of the Carling Cup on Wednesday night.
Prospective boss Paul Sturrock watched from the stands as Wednesday lost to a fluke Michael Doyle goal.
Doyle's 36th minute free-kick was meant as a cross but eluded everyone, including keeper David Lucas, and bounced into the net.
Three minutes later Sheffield's Glenn Whelan was sent off for a bad challenge on City's Matthew Mills.
Coventry: Steele, Carey, Shaw, Mills, Giddings (Whing 82),
Gudjonsson, Wood, Doyle, Barrett (Jorgensen 45),
Suffo (Johnson 75), John.
Subs Not Used: Shearer, Osbourne.
Booked: Gudjonsson, Whing.
Goals: Doyle 36.
Sheff Wed: Lucas, Greenwood, Bullen, Collins, Smith, McGovern,
Whelan, Marsden, McMahon (Shaw 80), Proudlock (Brunt 61),
Subs Not Used: Needham, Poulter, Foster.
Sent Off: Whelan (39).
Ref: P Armstrong (Berkshire).