Steve Cooper admitted Dean Henderson being ineligible for Nottingham Forest's EFL Cup semi-final tie against Manchester United "put a dampener" on Wednesday's quarter-final win against Wolves.
Henderson was the hero in a tense penalty shoot-out at the City Ground after Raul Jimenez cancelled out Willy Boly's opener in a 1-1 draw, denying Ruben Neves and Joe Hodge as Forest triumphed 4-3.
Dean Henderson was the hero for Nottingham Forest as he saved two penalties in a shoot-out against Wolves to send his side through to the Carabao Cup semi-final.
The on-loan Manchester United goalkeeper kept out spot-kicks from Ruben Neves and Joe Hodge as Forest emerged 4-3 winners after it had ended 1-1 in normal time.
Pep Guardiola's decision to name an understrength starting line-up backfired as Manchester City were beaten 2-0 by Southampton in Wednesday's EFL Cup quarter-final tie.
Erling Haaland, Kevin De Bruyne, Bernardo Silva and Ederson were among City's substitutes at St Mary's with Saturday's league game against Manchester United in mind.
Manchester United will face Nottingham Forest in the EFL Cup semi-finals, while Newcastle United meet Southampton.
Erik ten Hag's side beat third-tier Charlton Athletic 3-0 in the last eight and will travel to the City Ground for the first of the two-legged semi-final clash, as United search for a first trophy since 2017.
Manchester United prospect Kobbie Mainoo was handed his first senior start for the Red Devils as Erik ten Hag's side looked to reach the EFL Cup semi-finals.
Mainoo, a 17-year-old midfielder, appears to be the next in line on a long list of illustrious United academy products after being named in Ten Hag's starting XI for Tuesday's home clash with League One side Charlton Athletic.
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