LONDON, April 27 (Reuters) - Manchester United will be backed by their owners to "kick on" after securing their 20th league title, manager Alex Ferguson said. United clinched the Premier League crown with a 3-0 win over Aston Villa on Monday and Ferguson is already making plans to defend it next year with the support of the club's American owners. "Having spoken with the Glazer family, there is every intention to kick on," Ferguson told reporters. "We possibly need two players. It depends. ... More...