Manchester City vs Manchester United All Goals & Highlights Roberto Mancini faces his toughest test as the Manchester City manager when his team welcomes Manchester United in the first leg of their Carling Cup semi final clash on Tuesday. Sign up here at Watch Football Now to watch the game live. We are the leading source to watch live Carling Cup football on the web. The Carling Cup provides Mancini a great chance to mark his debut season at the City of Manchester Stadium by winning a trophy. City came very close to snatching a point against a full strength United side at Old Trafford early this season and the former Inter Milan coach will be confident that his side can improve on that result and qualify for their first ever final in more than 28 years. While Alex Ferguson has pursued the policy of giving his young players a chance to impress in the Carling Cup for the last couple of seasons, the United manager is expected to field a strong team on Tuesday as he looks to make sure that his club remains the dominant force in the region. United won the competition on penalties last season and though Carling Cup remains bottom of the list among the coveted trophies, Ferguson will be confident that his side can win its fourth league cup title should they successfully see off the challenge posed by City. Watch Manchester City vs Manchester United Live online on Watch Football Now, the leading source to watch live footy streams on the web.