Crawley Town bowed out of the Carabao Cup in the first round when they were comfortably beaten 5-1 by Birmingham City.
Former Sheffield United player Che Adams scored a hat-trick and there was also a brace for David Davis.
Reds finished on a high with a spectacular 85th minute consolation goal by substitute Panutche Camara.
Harry Kewell made nine changes to the side which lost 3-1 to Port Vale on Saturday.
Matt Harrold came in as captain and there were also starts for Dean Cox, Kaby Djalo, Josh Payne, Dennon Lewis, making his starting debut, Andre Blackman, Joe McNerney, Aryan Tajbakhsh and Moussa Sanoh
Harry Redknapp’s Blues made five changes from the line-up which lost 1-0 to Ipswich Town with Paul Robinson coming in from suspension as captain.
Reds twice went close in the opening stages when Cox’s cross to Harrold in the area was cleared, then Sanoh had a shot blocked.
Adams gave Birmingham the lead in the 28th minutes when he combined with Davis from a quick free-kick and scored from 20 yards.
City nearly added to the scoreline when keeper Glenn Morris held the ball from a chip which hit the post.
Birmingham made it 3-0 on the half hour by scoring twice in two minutes, firstly Davis finishing low beyond Morris, then Adams with his second of the evening from close-range following a corner.
Blues added a fourth three minutes into the second half when substitute Robert Tesche, who had replaced double scorer Davis, headed in Cotterill’s cross.
Crawley made their first substitution, bringing on Saturday’s man of the match and goalscorer Enzio Boldewijn for Djalo.
Kewell then brought on Billy Clifford for Tajbakhsh.
City made it 5-0 on 66 minutes when Adams completed his hat-trick with a low finish.
Town brought on one of the stars of pre-season, striker Camara with 20 minutes to go in place of Sanoh.
Crawley went close to getting on the scoresheet when Blackman’s drive was saved by keeper Tomasz Kuszczak before at the other end Morris saved superbly to deny Cotterill.
Harrold nearly scored but hit the side-netting before Gardner curled a free-kick wide for the hosts.
Cox then had a penalty appeal turned down when he was brought down in the box.
Former Dulwich Hamlet striker Panutche then scored a consolation goal with five minutes to go with a well-taken shot from the edge of the box, having been set-up by Clifford for his first goal at Football League level.
REDS: Morris, Tajbakhsh, McNerney, Yorwerth, Blackman, Lewis, Payne, Djalo (Boldewijn 52), Cox, Harrold (capt), Sanoh
Subs: Mersin, Young, Roberts, Lelan, Clifford, Camara
Birmingham City: Kuszczak, Nsue (Harding 59), Grounds, Roberts, Kieftenbeld, Adams (Gardner 70), Maghoma, Cotterill, Davis (Tesche 46), Robinson (capt), Gleeson
Subs: Stockdale, Donaldson, Ndoye, Morrison
Referee: Michael Salisbury
Attendance: 7,814 (133 away)