Kayla Harrison thought she had found a teammate, but Amanda Nunes saw a future rival. What really happened?
Inside the complicated history of Amanda Nunes and Kayla Harrison
Original reporting
ESPN: read the full reportRelated stories

Leader, role model, extraordinary - how Kane's 'fairytale' came true
From 21-year-old who scored 79 seconds into his debut to being on the brink of breaking his nation's appearance record, BBC Sport looks at Harry Kane's England career.
Big hit from Caps' Chychrun on Sens' Cousins deemed clean after review
The hit by Capitals defenseman Jakob Chychrun that injured Senators forward Nick Cousins was determined not to be a penalty after on-ice officials reviewed the play.
Celts' Tatum gets cold shoulder from Brown but has last laugh
Jaylen Brown and Jayson Tatum kept their distance during pregame warmups ahead of Tuesday night's Celtics-76ers matchup, before Tatum tried to dap up Brown before tip but was given the cold shoulder from the 76ers forward.
Georgia takes CFP's top spot, Notre Dame jumps six slots to No. 5
Georgia leapt into the No. 1 spot of the College Football Playoff rankings on Tuesday night, unseating Miami.
Source: Astros hiring former catcher Ausmus as new manager
The Astros are hiring Yankees bench coach Brad Ausmus, who played 10 of his 18 MLB seasons in Houston, as the team's new manager, a source confirmed to ESPN.
Sources: Giants called Falcons to inquire about star RB Robinson before trade deadline
The Giants made a call to the Falcons before the NFL trade deadline inquiring about star running back Bijan Robinson, multiple sources told ESPN.