Place top 3 on the scoreboard for 10 matches.
May take some time, especially now since the online community is much smaller and limited game modes. However that said it's also easier in a way since if you end up in a game of 6 you only have to beat 3 other players in score.
Easier in a mode with objectives to get score and also use defensive streaks over offensive for guaranteeing yourself more points as fast as possible. That said good luck
*MUST BE TOP 3 OVERALL NOT JUST YOUR TEAM FOR TROPHY TO COUNT*