Manchester City has been nearly flawless in the Champions League this season: It entered Matchday 4 with an undefeated record and zero goals conceded. But after a wild night in Portugal, City fell 4-1 to Sporting Lisbon to mar its run and raise serious questions about its fitness.

Those who studied with United's new coach explain his skills - and how a week in England six years ago influenced him

Ruben Amorim will ultimately be judged at Manchester United on closing the gap on Pep Guardiola, and on this stunning evidence he is ready for the challenge. The Portuguese coach predicted fans comparing him to Sir Alex Ferguson with victory against the great Guardiola in his final match at Estadio Jose Alvalade before heading to Old Trafford.