Pep Guardiola praised Phil Foden’s work ethic after the England star's double helped Manchester City reach the quarter-finals of the FA Cup.Foden scored twice – once in each half – to put the visitors in command against Championship side Bristol City before the fit-again Kevin De Bruyne’s superb late strike sealed a 3-0 victory at Ashton Gate.The 22-year-old has now scored a dozen times during a campaign in which he has not always been in Guardiola’s starting XI.