Goals from Patrick Bamford and Kike Garcia secured a 2-0 win for Aitor Karanka’s side against Manuel Pellegrini’s reigning Premier League champions. Scroll down and flick through our picture gallery to see the Boro team which played that day and what has happened to them all since:
9. CAM: Lee Tomlin
Tomlin struggled to adapt after leaving Boro for Bournemouth in 2015. Following spells at Bristol City and Nottingham Forest, the 31-year-old appears to have rediscovered his form at Cardiff this season. The playmaker has registered five goals and six assists since the start of the campaign. Photo: Getty Images
10. LW: Patrick Bamford
Following his loan spell at Boro during the 2014/15 season, Bamford signed for the Teessiders permanently two-and-a-half years later. The striker then joined Leeds in the summer of 2018 and has scored 10 Championship goals in 27 appearances this season. Photo: Alex Livesey
11. ST: Jelle Vossen
Following his season-long loan at Boro, Vossen had a brief spell at Burnley before signing for Belgian side Club Brugge in 2018. The striker has made just two league appearances this season. Photo: OLI SCARFF
12. Sub: Adam Reach
Now a key player for Championship side Sheffield Wednesday with the Owls targeting a spot in the play-offs this season. Photo: Getty Images