Board Thread:Naruto News/@comment-26490760-20150620025728/@comment-26506075-20150627182242

Shybreeze is right it is Konohamaru in there with bolt & his teammates. And the plot (that I read in this wiki itself) says " Following Sarada Uchiha, Boruto meets his father's friend, Sasuke Uchiha, and requests to be trained by him."So its obvious that Sasuke is't their sensei.