Gabriel Martinelli scored a last-minute winner to send Brazil into the last 16 on Monday, but it wasn't just the dramatic comeback that captured attention after the final whistle. A viral video showing a devastated Japan supporter being comforted by Brazil fans has taken over social media, with viewers later debating whether the emotional scenes were genuine.Brazil completed a stunning turnaround after trailing at half-time. Japan was the better side in the opening 45 minutes and went ahead in the 29th minute when Kaishu Sano fired home a brilliant strike.However, Brazil took control after the break as Casemiro headed home the equalizer before Martinelli struck in the final minute of added time to complete the comeback and seal Brazil's place in the knockout stage.At the final whistle, one heartbroken Japan supporter was filmed taking off his jacket, throwing it to the ground and screaming in frustration after the late defeat.A Brazil fan then draped a Brazilian flag over his shoulders. The Japanese supporter briefly looked at the flag before continuing to scream, after which a woman also wrapped another Brazilian flag around him in an apparent attempt to comfort him.— ClawdiaFox (@ClawdiaFox) Another video, believed to have been recorded shortly after the match, shows the same supporter with his signature blue hair still appearing emotional before a Brazil fan exchanged T-shirts with him and tried to console him.— SalimoAnne (@SalimoAnne) The clips quickly went viral across social media, with many praising the apparent display of sportsmanship between rival supporters. However, others claimed the emotional reaction had been staged.One social media user wrote, "He’s a content creator, those tears are fake." Reacting to that claim, another responded, "Oh is it?" Bello Oluwatosin replied, "Yes now"Another user, commented, "Thats the Brazilian calm down gesture" Meanwhile, X users also questioned the video's authenticity, writing, "It would be more realistic if only he did a little better by cropping out the starting where he adjust the phone camera."As the Asian team has yet to experience victory in a World Cup knockout match, this is the fifth time Japan has been eliminated at this particular stage of the competition.