I do MMA,and I am fighting a Boxer in the ring wed.....?

I train MMA,and this mexican piertorican kid Does Boxing,he has had a year under his belt,with me at 15 months.,he also goes to the same school as me,and was saying he could beat my ***,and I said I am not getting expelled for fighting you here,lets do it at the ring, (Im not even mad I just like to fight) so,what do you think should be my First move? I do Kickboxing,Muay Thai and BJJ,I was think flying knee and cover the face,or a superman Punch. Flying knee is ment to back him up or get his gut real good and submit his ***. He 5'9 I am 5'10 he has about 10 lbs on me.