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Middlesbrough last won the competition in 2004

Middlesbrough's League Cup penalty win over Manchester United was "lucky", says Red Devils boss Louis van Gaal.

The Championship side won the shootout 3-1 to progress to the last eight after a goalless 120 minutes at Old Trafford.

"It is more like the casino, red or black," Van Gaal said. "We trained yesterday on penalties, but it is like that. I cannot take them."

Andreas Pereira scored his but England trio Wayne Rooney, Michael Carrick and Ashley Young all missed from the spot.

United lost their fourth successive penalty shootout and the Dutchman saw his side knocked out of the competition by a lower-league team for the second successive season following defeat by MK Dons last term.

In normal time, Middlesbrough winger Stewart Downing's powerful shot was tipped over, while United's Jesse Lingard saw his effort hit a post.

United defender Daley Blind put the ball into his own net only for Boro striker Kike to be flagged offside.

Van Gaal added: "They were lucky but of course you can force the luck.

"We have created a lot of chances, especially in the second half and in extra time. We had chances from one metre, two metres in front of the goal. We have to finish those.

"In football it is always the goals that are counting and not the chances."

Boro boss proud of 'amazing' performance

Middlesbrough boss Aitor Karanka said: "I told my players after the game that we were better than them - we were more confident on the pitch, we were fitter than them.

"I have to say how proud I am of my players. Penalties sometimes you lose - last season we lost against Liverpool after 30 penalties - and sometimes you can win like today.

"The main thing is the performance, and the performance today against Manchester United, a big team, it was amazing."

Boro will play Everton at home in the last eight, with the ties to be played in the week commencing 30 November.

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BBC Sport's Mark Chapman noticed a worrying pattern for England fans in the shootout

Typically cutting analysis from BBC television and radio presenter Danny Baker on how Manchester United's defeat reflected on the English top-flight