Match ends, Newcastle United 0, Sheffield Wednesday 1.
Newcastle's poor start to the season continued as they were knocked out of the League Cup by Championship side Sheffield Wednesday.
Lewis McGugan's 76th-minute shot from outside the box gave victory to Wednesday, who made 10 changes from their previous match.
Newcastle's Moussa Sissoko had clipped the post before the break.
The result leaves Magpies boss Steve McClaren with just one win from his first eight matches in charge.
The former England manager has just three wins from his last 21 matches, combining results from previous club Derby County.
Those victories came against Wigan, Blackpool and Northampton Town, who Newcastle beat in the second round.
Wednesday were unlucky not to double their lead when hitting the crossbar twice in as many seconds.
Tim Krul tipped Lucas Joao's header onto the woodwork before Sergiu Bus's follow-up crashed over.
Siem de Jong missed two good chances to equalise late on, scuffing one shot wide before volleying over the bar as Wednesday reached the fourth round for the first time in 14 seasons.
League Cup fourth-round draw
Manchester City v Crystal Palace
Liverpool v Bournemouth
Manchester United v Middlesbrough
Everton v Norwich City
Southampton v Aston Villa
Sheffield Wednesday v Arsenal
Hull City v Leicester City
Stoke City v Chelsea
(Ties to be played on 27 and 28 October)
Sheffield Wednesday manager Carlos Carvalhal: "We know we beat a very good team with a very good coach in their stadium, so of course we are very happy about that.
"We picked these players to show a different face in relation to the last three matches. We tried to play more compact, block all the ways for Newcastle and with four very quick attackers.
"I am very happy with the players. They were perfect in the strategy that we brought to this match."
Newcastle manager Steve McClaren: "There's not a lot you can say. There are no excuses - back in tomorrow morning, Chelsea Saturday, it's the fighting mentality we need.
"I've been in football too long to be embarrassed. Things like that can happen in football, and, yes, it's a very disappointing result and evening for everybody."
- 22JanmaatSubstituted forMbabuat 45'minutesBooked at 61mins
- 20ThauvinSubstituted forPérezat 45'minutesBooked at 75mins
- 14ObertanSubstituted forToneyat 71'minutes
- 10de Jong
- 24SougouSubstituted forBannanat 86'minutes
- 10McGuganBooked at 90mins
- 7MatiasBooked at 61minsSubstituted forBusat 65'minutes
- 18Lucas JoãoSubstituted forNuhiuat 80'minutes
- Chris Kavanagh
- Shots on Target
Second Half ends, Newcastle United 0, Sheffield Wednesday 1.
Attempt saved. Sergiu Bus (Sheffield Wednesday) right footed shot from the right side of the box is saved in the top centre of the goal.
Lewis McGugan (Sheffield Wednesday) is shown the yellow card.
Foul by Vurnon Anita (Newcastle United).
Atdhe Nuhiu (Sheffield Wednesday) wins a free kick in the defensive half.
Attempt missed. Siem de Jong (Newcastle United) right footed shot from the centre of the box is too high.
Attempt missed. Siem de Jong (Newcastle United) right footed shot from the centre of the box is close, but misses to the left.
Substitution, Sheffield Wednesday. Barry Bannan replaces Modou Sougou.
Attempt saved. Georginio Wijnaldum (Newcastle United) right footed shot from outside the box is saved in the centre of the goal.
Corner, Newcastle United. Conceded by Jeremy Helan.
Substitution, Sheffield Wednesday. Atdhe Nuhiu replaces Lucas João because of an injury.
Corner, Sheffield Wednesday. Conceded by Kevin Mbabu.
Lewis McGugan (Sheffield Wednesday) hits the bar with a right footed shot from the centre of the box.
Lucas João (Sheffield Wednesday) hits the bar with a header from the left side of the six yard box.
Goal! Newcastle United 0, Sheffield Wednesday 1. Lewis McGugan (Sheffield Wednesday) right footed shot from outside the box to the bottom left corner.
Ayoze Pérez (Newcastle United) is shown the yellow card for a bad foul.
Foul by Ayoze Pérez (Newcastle United).
Josè Semedo (Sheffield Wednesday) wins a free kick in the attacking half.
Foul by Ivan Toney (Newcastle United).