Manchester United can be champions under Jose Mourinho, insists Eric Cantona

File photo of Eric Cantona. Reuters[/caption]"But this is an extremely difficult championship, full of great teams and great managers like (Manchester City coach) Pep Guardiola," he added.Since Alex Ferguson retired after winning the league in 2013, Manchester United have finished seventh, fourth and fifth, their only major trophy during that time being last season's FA Cup.The club kicked off their league campaign this season with three straight wins under Mourinho, but slumped to back-to-back defeats against Manchester City and Watford.They are in sixth place in the English Premier League table with 12 points after seven matches.After the international break, Manchester United travel to Liverpool on October 17.Cantona, 50, won four league titles with united prior to retiring in 1997 at the end of a colourful career in which he became a cult figure at Old Trafford. He now lives in Lisbon.