A little tough fight

Guidibba.
He doesn't give me many problems but :
How can I pass to the other side?
Because I can't beat him,is there any strategy?All the time that I fight with him,after soe rounds,the fight is over.
He doesn't give me many problems but :
Spoiler: show
How can I pass to the other side?

Because I can't beat him,is there any strategy?All the time that I fight with him,after soe rounds,the fight is over.
