Wasps full-back Jacob Umaga was shown a red card against Northampton Saints after knocking himself out in a dangerous collision with winger Courtnall Skosan.
Saints recorded a dramatic last-gasp victory against Wasps on Sunday, as speedster Skosan crossed the whitewash in the dying moments of the game to lock in a 36-40 scoreline.
Earlier in the match however, a cross-field kick from George Furbank into Skosan resulted in a dangerous aerial collision with Umaga.
