Timm Klose’s first half injury exit capped a miserable League Cup second round 1-0 exit to League Two Crawley Town on Tuesday night.

Captain Klose was forced to hobble off after a heavy challenge with Panutche Camara on his first start since a hip flexor problem in pre-season. Daniel Farke confirmed afterwards the central defender may have suffered ACL knee ligament damage but will now undergo tests to assess the extent of the injury.

Bez Lubala's angled strike in the 17th minute from a quickly taken corner sealed a cup shock for the Reds at Broadfield Stadium.

Farke opted to overhaul his Premier League line up from the 3-2 weekend defeat to Chelsea. The City head coach handed five competitive debuts to his squad - headlined by a first team bow for teenage striker Adam Idah.

Ibrahim Amadou made his debut following a summer switch from Sevilla alongside Mario Vrancic, with Patrick Roberts in a midfield three.

Philip Heise made his debut at left back and Christoph Zimmermann also made a welcome return after close season knee surgery.

The Canaries' head coach underlined his pre-match pledge to treat the League Two hosts with respect in naming a substitutes' bench that included Emi Buendia, Ben Godfrey and Tim Krul.

Teemu Pukki and Grant Hanley were given a night off while Josip Drmic (hamstring) was ruled out and Alex Tettey was absent due to personal reasons.

McLean tested Michael Luyambula inside the opening seconds from Zimmermann's raking pass that had enticed Heise forward.

The German then surged into the penalty box himself but the Crawley keeper had his angles right a second time at his near post.

Idah sensed a chance for a maiden goal when he drifted to the back post, as Heise made another buccaneering run forward, but his cross brushed the top of the youngster's head.

Amadou sparked a City raid in the 16th minute that ended with McLean heading at Lyambula from Byram's stood up cross.

But Crawley's first foray into Norwich territory brought a goal against the run of play. Lubala gathered a quickly taken short corner and rifled an angled shot into the far corner, with the sliding Idah's attempted clearance diverting the ball beyond Fahrmann.

The news deteriorated further when Klose was forced to hobble out of the action following a heavy sliding collision with Panutche Camara that earned the Crawley player a booking.

Klose tried to return to the fray after treatment but dropped to the turf again on the far touchline to be replaced by Ben Godfrey.

The Swiss international's departure, coming after Crawley's surprise breakthrough, disrupted City's early rhythm and composure. Fahrmann was suddenly being forced to kick long with the likes of Vancic and McLean struggling to get any time on the ball against the emboldened Reds.

Vrancic did fashion a chance for Roberts in the 36th minute, who cleverly checked inside two but struck the outside of the far post from the angle of the six yard box.

Felipe Morais rifled a free kick over in the first minute of the second period after Amadou took evasive action to halt another Crawley burst.

Fahrmann came and then missed his attempted punch but escaped, with the hosts starting on the front foot.

Josh Doherty crudely halted Byram at the opposite end to present a set piece of promise in front of the travelling support. Vrancic however picked out Luyambula as the yellow shirts closed in.

Farke dipped into his resources 10 minutes after the break with Buendia replacing Zimmermann, who appeared to pull up sharply just before a stoppage but ran off the pitch unaided. Farke revealed he suffered a knock to his back in his post-match press briefing but the big defender is not expected to be out for any length of time.

Amadou slotted into centre back to underline the versatility Farke had spoken about in the build up.

Idah tested the Crawley keeper on the resumption before Byram appeared to tumble under pressure in the Crawley box from the corner but the official waved away a penalty appeal from the full back.

David Sesay was then thwarted by McLean's smothering block with the game swinging from end to end.

Buendia rattled the Crawley bar on the hour mark with a rising strike, after exchanging passes with McLean before unleashing a left-footed effort 12 yards.

City were now pushing the Reds back, and Byram's cross flashed in front of Roberts before Buendia tried to find the Manchester City loanee with a chip that rolled behind.

But Crawley caught Norwich out on the counter in the 69th minute when Fahrmann clawed out Ollie Palmer's effort, after he barrelled his way past Byram and Godfrey.

That sparked a second smoke bomb thrown from the home end which swiftly cast a pall of red smoke across Fahrmann's six yard box.

Nathan Ferguson clubbed over Morais' free kick as the smoke cleared. Buendia continued to be the man most likely to pick a lock for the Premier League side. A slaloming run across the box ended with Byram's cross deflected away before Vrancic's looping shot popped up to Luyambula.

Fahrmann went scrambling to his right in the 76th minute but Ferguson's right-footed flew just wide from 20 yards.

The normally laid back Farke was booked with 10 minutes remaining after becoming embroiled in a heat exchange with one of Crawley's backroom staff following a meaty collision in front of the dug outs involving Godfrey.

Former City academy product George Francomb was introduced in the 87th minute just seconds after Vrancic was unable to head home inside the six yard box from Buendia's free kick.

- Crawley: Luyambula, Sesay (Francomb, 87), Dallison, Tunnicliffe, Doherty, Bulman (C), Ferguson, Grego-Cox, Camara (Morais 34), Lubala, Palmer. Subs (not used): Morris, Galach, Nathaniel-George, Young, Nasdean.

- Bookings: Camara (foul on Klose, 23); Luyambula (foul on Idah, 61); Bulman (foul on Roberts, 86); Grego-Cox (foul on Heise, 88)

- Goal: Lubala (17)

- Norwich City (4-2-3-1): Fahrmann, Byram (Aarons 86), Zimmermann (Buendia 55), Klose (C) (Godfrey 27), Heise, Amadou, Vrancic, Roberts, Srbeny, McLean, Idah. Subs (not used): Krul, Leitner, Lewis, Stiepermann.

- Bookings: Vrancic (foul on Bulman, 29); Farke (dissent, 80)

- Added on time: 6 minutes / 5 minutes

- Referee: John Busby (Oxon)

- Attendance: 5,109