Denis Boytsov was once compared to Mike Tyson and stood within reach of a world heavyweight title shot. At 29, a mysterious incident on the Berlin subway tracks destroyed his career and left him fighting to get his life back. Eleven years later, that battle...

Denis Boytsov was once compared to Mike Tyson and stood within reach of a world heavyweight title shot. At 29, a mysterious incident on the Berlin subway tracks destroyed his career and left him fighting to get his life back. Eleven years later, that battle...

Denis Boytsov was once compared to Mike Tyson and stood within reach of a world heavyweight title shot. At 29, a mysterious incident on the Berlin subway tracks destroyed his career and left him fighting to get his life back. Eleven years later, that battle...

Denis Boytsov was once compared to Mike Tyson and stood within reach of a world heavyweight title shot. At 29, a mysterious incident on the Berlin subway tracks destroyed his career and left him fighting to get his life back. Eleven years later, that battle...

Denis Boytsov was once compared to Mike Tyson and stood within reach of a world heavyweight title shot. At 29, a mysterious incident on the Berlin subway tracks destroyed his career and left him fighting to get his life back. Eleven years later, that battle...