Ruslan smashed Chris w/ a Siberian sledgehammer and Chris wasn't even really hurt. Then Pacquiao dropped him 4X, had him on stanky legs, and he survived. Amazing. :deal
Find it interesting he was stopped by a punch in the world combat league kickboxing fight. Yet Provodnikov nor Pacquiao punches could do the same.
There is a difference between punch resistance and recuperative powers. Algieri has very good recuperative powers but not good punch resistance. Much like JMM, Trinidad, etc. he is fairly easy to drop but very hard to stop.