Cristiano Ronaldo scored on his first start of the season in Manchester United's 3-1 League Cup victory over Middlesbrough and Mexican star Carlos Vela hit three as Arsenal's youngsters overwhelmed Sheffield United 6-0 on Tuesday. Liverpool edged League One Crewe 2-1 but West Ham and Fulham were the victims of third-round upsets. The Hammers lost 1-0 at Watford and Fulham went down 1-0 at Burnley. Source: RONALDO SCORES IN FIRST START AS MAN U ADVANCE IN LEAGUE CUP