block with palm or elbows if u are so concerned...
even more.. (since we are talking about streetfighting) duck under or just grap his hand. if u duck under then it is ur turn to attack and he wont be protected after the missed punch. duck under and come back with some good atack. u can do whatever u feel like doing... headbuttin, punching, kicking, tacklin.. up to you
do what you say and say what you do
no pain no gain