4 – SHANKS vs DRACULE MIHAWK
In the past, Mihawk was a rival to one of the most powerful pirates in the world, Shanks.Their battles were said to shake the whole of the Grand Line and Mihawk often sought Shanks out for duels. After Shanks lost his arm twelve years ago, Mihawk ceased seeking him out for duels. At some point, he earned the title of “World’s Greatest Swordsman” and joined the ranks of the Shichibukai.
Mihawk retains a neutral, though somewhat friendly relationship with Shanks, and is able to track him down if the need arises. He and Shanks do manage to get along, regardless of the fact that the two are opposites in personalities.
3 – EDWARD NEWGATE “WHITEBEARD” vs GOL D. ROGER
Gol D. Roger was the first man to conquer the Grand Line. Being the Pirate King and all, he made a lot of enemies. One of them was Whitebeard, who was said to be one of the few who could match Roger in a fight.
Despite having been rivals with Gol D. Roger, Whitebeard held much respect for him. Not long before his death, Roger met with Whitebeard on an island to have what seemed to be an entirely cordial drinking session, with Roger even offering to give the location of Laugh Tale to Whitebeard, and when Whitebeard asked Roger about the Will of D., Roger willingly told him about it. Upon learning that Ace was his rival’s son, Whitebeard did not see his bloodline as an inconvenience, and even tried to inspire Ace to respect Roger as his father.
2 – GOL D. ROGER vs MONKEY D. GARP
As a Marine, Garp attempted to kill Roger several times. A s such, they have a long history against each other with the exception to the Rocks Pirates. However, when Roger was about to be executed, after turning himself in due to his terminal illness, he made a final request to Garp. He asked Garp to take care of his unborn child, as he did not deserve to be condemned as a criminal because of his father’s crimes.
Due to their countless clashes, Roger came to see Garp as much of a friend as the rest of his crew. Garp too seemed to have some form of respect for him as he not only protected Ace but showed signs of disappointment from Ace’s decision to disregard Roger as being his father. He also told Dadan that although he is a Marine, he could never come to hate Roger.
1 – ROCKS D. XEBEC vs GOL D. ROGER
Rocks D. Xebec was the captain of the Rocks Pirates, a legendary pirate crew that sailed the seas 38 years before the current storyline. They were considered to be the most powerful pirate crew of their time.
Rocks D. Xebec appeared to be an incredibly vicious and ambitious man, his dream was to become the King of the World and he attacked many locations and left mass destruction in his wake to assert his dominance.
He was also considered to be the most formidable rival of the Pirate King Gol D. Roger, even more so than his subordinate Whitebeard would come to be; it took both Roger and Monkey D. Garp to finally kill Rocks D. Xebec.