Answer
Sheffield United reached the semi-finals of both the League Cup and FA Cup in 2003 under the guidance of manager Neil Warnock. The Blades' impressive run in the League Cup saw them defeat Premier League sides Tottenham Hotspur and Aston Villa, while their FA Cup journey included victories over Manchester City and Blackburn Rovers. Warnock's tactical acumen and the team's resilience played a crucial role in their success that season.