Manchester City failed to back up their stunning win over Barcelona as Marten De Roon snatched a 1-1 draw for Middlesbrough.
Marten de Roon struck late for Middlesbrough as Manchester City were made to pay for failing to add to Sergio Aguero's 150th goal for the club in a 1-1 Premier League draw on Saturday.
City absolutely dominated the game at Eithad Stadium, but former Barcelona player Victor Valdes produced an inspired performance in the Boro goal to ultimately deny Pep Guardiola, with whom he enjoyed four glittering years in Catalonia.
Aguero had pounced late in the first half to put City ahead following a frustrating opening period.