Chris Wilder says he was pleased with Sheffield United's "attitude to adversity" after they came from behind to beat Wrexham 4-2 in the EFL Cup first round on Tuesday.

William Boyle gave the Red Dragons the lead just before the half-hour mark, but the Blades were back on level terms six minutes later thanks to Auston Trusty's equaliser.

Lewis Brunt's own goal, coupled with strikes from Louis Marsh and Anis Ben Slimane put United in a commanding position with five minutes remaining, meaning Sebastian Revan’s late goal was nothing more than a consolation.

Despite going behind, United were the dominant side, having 20 shots, eight of which were on target, as they inflicted a third-straight EFL Cup defeat on Wrexham.

And Wilder, who made 11 changes from their Championship opener against Preston North End last Friday, was particularly pleased with how his youthful side responded to the early setbacks.

"I liked the attitude to adversity in terms of losing a player early on [Femi Seriki went off injured] and missing a few chances early on and going a goal behind," Wilder said after the game.

"I thought we kept our shape and controlled the game. We had to be patient, and we kept that discipline, didn't force it, and I'm delighted we took our chances in the second half.

"[Resilience is] what we need. It's not going to be a straight-forward season. Regardless of the amount of changes we made, it was pretty much how I wanted it to look tonight. Play with a smile on your face, look out for each other, which they did, and if things happen that don't go your way, keep believing in what you're doing and that's what they did.

"It was a competitive game, and we had to match that and come out the other side. Nobody's going to bully us. Compete and play and win, and we did all three."

Elsewhere, the big upset of the round came courtesy of League Two Fleetwood Town, who came from behind to beat Championship side West Brom 2-1.

Blackburn Rovers claimed an emphatic 6-1 victory over Stockport County to book their place in the next round, with Sammie Szmodics scoring a first-half brace to set them on their way, while Watford also coasted through with a big win as Tom Ince's hat-trick helped them to a 5-0 victory over MK Dons.

Meanwhile, six of the ties ended with penalties. Grimsby Town triumphed in a thrilling shoot-out at Blundell Park against Bradford City after a 1-1 draw in normal time, winning 9-8 as 20 spot-kicks were taken. 

Bradford manager Mark Hughes hopes a good cup run can boost their league form after a 4-1 penalty shoot-out win over Accrington in the Carabao Cup first round.

The Bantams reached the League Two play-offs last season but lost their league opener on Saturday.

Summer signing Alex Pattison got them off their mark in the first minute of first-half stoppage time at the Wham Stadium, racing one-on-one with keeper Toby Savin and slotting past him.

Stanley, relegated from League One last season, levelled on 66 minutes when Jack Nolan’s cross was headed home by Birmingham loan striker Josh Andrews.

Neither side could grab the winner and, while Bradford converted their four penalties in front of their fans, Nolan and Korede Adedoyin missed theirs for Stanley.

Hughes said: “They were four good penalties and it was good to take them in front of our fans. We wanted to progress in cup competitions as it’s important financially and it can help your league form as well. You just have to see where it takes you.

“The players were really determined after the disappointment at the weekend and I thought we were excellent throughout the game.

“It wasn’t an easy cup tie but it was enjoyable to watch and I think, on the performance, we merited the win.”

Accrington boss John Coleman said: “It was a scrappy game, we cancelled each other out.

“They took the lead but we stepped it up in the second half and I think we probably did enough to win the game based on our second-half performance, their keeper made a couple of good saves.

“We had two bizarre penalty misses. Jack Nolan hit the underside of the bar and Kody slipped when he took his and then you know it probably isn’t your night.”

Bradford saw off League Two rivals Accrington 4-1 on penalties following a 1-1 draw after 90 minutes.

The Bantams scored all of their spot kicks, with Jack Nolan and Korede Adedoyin unable to convert theirs for Stanley.

The first 45 minutes were cagey in terms of goalmouth action.

The game burst to life in the first minute of added time when a Harry Lewis goal kick was flicked on to send Alex Pattison clean through and he finished beyond Toby Savin for the first Bradford goal of the campaign.

Stanley, relegated last season, almost replied immediately but Lewis did well to keep out Adedoyin’s fierce drive.

The game opened up after the break.

Stanley captain Shaun Whalley tricked his way into the area but was denied by Lewis while last season’s top League Two scorer Andy Cook headed over and had an effort saved for the Bantams.

Whalley had another effort saved before Stanley equalised on 66 minutes.

From a short corner, substitute Nolan crossed for fellow substitute Josh Andrews, on loan from Birmingham, who headed home his first Accrington goal – both had only been on the pitch two minutes.

Both sides went on the hunt for the winner without a clear-cut chance, including 14 minutes of added time, before the shoot-out.