User blog comment:Kaido King of the Beasts/Chapter 870: There and Back Again/@comment-3529684-20170630005707/@comment-2001:8003:1172:2900:2459:2E2F:1A87:314A-20170630183108

HanataSanchou I disagree

With Kalfia (and later Vergo) Sanji is using his shin to block her kicks,

http://www.mangareader.net/one-piece/403/3

While here along with Luffy Sanji is clearly clashing with her attack with his DJ foot rather than his shin.

http://img.readms.net/cdn/manga/51/4379/16_171.png

I wouldn't say Luffy's massive Haki Gear 3 attacking fist is "blocking" the attack  so the same should apply to Sanji as well, it's clashing not guarding.