when using sorin markov, can you make your opponent attack themselves?

[kinda]

If I use Sorin Markov can I make other player attack himself?

[Kenji]

No. When you take control of a player, you can only make choices for them that they could normally make legally. Here's the excerpt from the Comprehensive Rules that explains this:

712.5. While controlling another player, a player makes all choices and decisions the controlled player
is allowed to make or is told to make by the rules or by any objects. This includes choices and
decisions about what to play, and choices and decisions called for by spells and abilities.

The important part of the above is "...decisions the controlled player is allowed to make or is told to make by the rules or by any objects." Nothing in the rules allows you to attack yourself normally, and controlling a player doesn't allow you to make them do so either.