Watch Match of the Day pundits Theo Walcott, Stephen Warnock and Julien Laurens analyse Real Madrid's poor form since the arrival of summer signing Kylian Mbappe after their 3-1 defeat to AC Milan in the Champions League.
Watch as Aston Villa defender Tyrone Mings gifts Club Brugge a penalty to take the lead in the Champions League with an 'extraordinary' handball after picking up a pass from goalkeeper Emiliano Martínez.
A defiant Pep Guardiola says he relishes the challenge ahead for the season as Manchester City suffer their third defeat in a row across all competitions, losing 4-1 to Sporting CP on match week four of the Champions League.
Celtic are looking for three successive home wins in the Champions League for the first time since 2007, but RB Leipzig are fighting for their lives in the competition, writes Tom English.