Chris Wilder labelled Middlesbrough's defeat at Bristol City a "backward step" as he was on the losing side for only the third time since taking over at the Riverside in early November.
Andi Weimann and Antoine Semenyo did the damage for City in a clinical attacking display, with the Robins then withstanding a late rally from the visitors to record their fourth straight Championship win at home.
Boro's travel plans were disrupted by Storm Eunice as the squad were unable to fly during the daytime to Bristol, with the squad boarding a plane at Teeside Airport only for it to be cancelled on the runway, and instead had to take a five-hour coach trip to the south west which meant they didn't arrive until 10:30pm.