Substitute Josh Coburn scored a fine winner in extra time as Middlesbrough stunned Tottenham to reach the quarter-finals of the FA Cup.
Buoyed by a sell-out crowd at the Riverside for the first time in five years, Chris Wilder's side, who beat Manchester United in the last round, were a match for their Premier League opponents and broke the deadlock in the 107th minute.
Coburn latched on to Matt Crooks' pass before the 19-year-old thumped an effort beyond Hugo Lloris and into the far corner from a tight angle.
Tottenham hope Antonio Conte is the manager to end their 14-year wait for a trophy but the Premier League club will have to wait at least another season.