In a recent football match, Millwall's player Roberts was sent off after committing a dangerous challenge on Mateta. The incident occurred during the game, and the referee deemed the tackle severe enough to warrant a red card. This decision had a significant impact on the match, as Millwall was forced to play with one less player for the remainder of the game. The challenge has been described as 'dangerous play' and has sparked discussion among fans and pundits about player safety and fair play in the sport.