Middlesbrough and Blackburn Rovers both finished with 10 men as they shared the points at the Riverside Stadium.
Sam Gallagher put the visitors in front after 17 minutes, before Boro captain Jonny Howson equalised before half-time.
Blackburn defender Hayden Carter was sent off late on for two bookings, and he was quickly joined by home midfielder Samy Morsy, who was shown a straight red for a late challenge.
The result keeps both teams mid-table in the Championship, with one defeat apiece from their five games.
The match pitched together the Championship's oldest manager in Neil Warnock and the longest-serving in Tony Mowbray, but the latter is more likely to be happy with a point.