Passage: Helmsley was being highlighted again in 1997, winning the 1997 King of the Ring tournament by defeating Mankind in the finals. Later that year, Shawn Michaels, Helmsley, Chyna and Rick Rude formed D-Generation X (DX). This stable became known for pushing the envelope, as Michaels and Helmsley made risqué promos—using the catchphrase "Suck It" and a "crotch chop" hand motion—and sarcastically derided Bret Hart and Canada. By that point, Helmsley had fully dropped the "blueblood snob" gimmick, appearing in T-shirts and leather jackets. During this period, his ring name was shortened to simply Triple H, even though he would still be referred for a while as Helmsley from time to time and Hunter for the rest of his career. Even after the DX versus Hart Foundation storyline ended, he continued to feud with the sole remaining Hart family member Owen over the European Championship. This ended in a match between the two at WrestleMania XIV, with the stipulation that Chyna had to be handcuffed to then-Commissioner Sgt. Slaughter. Triple H won after Chyna threw powder into Slaughter's eyes, momentarily "blinding" him and allowing her to interfere in the match.After WrestleMania, Michaels was forced into temporary retirement due to a legitimate back injury sustained at the Royal Rumble, with Triple H taking over the leadership position in DX, claiming that his now-former associate had "dropped the ball". He introduced the returning X-Pac the night after WrestleMania and joined forces with The New Age Outlaws. As 1998 went along, DX became more popular, turning the group from villains to fan favorites. During this time, he adopted an entrance gimmick of asking the crowd "Are you ready? I said, are you ready?", followed by a parody of rival promotion WCW's ring announcer Michael Buffer's famous catch-phrase, "Let's get ready to rumble", substituting the word "rumble" with the DX slogan, "suck it". Also during this time, Triple H began a feud with the leader of the Nation of Domination and rising WWF villain, The Rock. This...

Question: Whom did Helmsled had to defeat in order to win 1997 tournament?
Mankind