He is a fighter. He is man with strong will and determination.

Call him "a tough cookie".... A person who struggles hard without giving up. He faces every difficulty and problem on his way to success but still keeps going and finally gets what he wants. (tough = very strong, hard. Cookie = biscuit) Just like a very strong cookie or biscuit is hard to chew.

He's a real fighter. He gives it all he's got. He's in it to win it.

You could say "A man who fights for what he wants".......or you could also say "A man who strives to acheive his goals against all odds".