While still only twenty, Stone defeated the reigning 1912 BBofC and NSC British welterweight champion Johnny Summers on May 18, 1913 in a non-title twenty round points decision at Olympic Stadium in Brisbane, Australia.
 Though less experienced and six years younger, he was considered by most reporters to have outpointed Summers in nearly every round.
In September, Stone defeated Summers again in a twenty-round points decision in Sydney.
 Stone later said of his second win against Summers, that he looked back on the fight as the "greatest of all his Sydney encounters".
 Assessing Summers' skills, Stone wrote "He was a fighter with a world-wide reputation, and he had a wallop that would stop any clowning if he landed it, but his speed was not comparable to mine".
 He later fought Summers to a twenty-round draw in Kensington, England on June 13, 1914 in a bout that was billed as a world welterweight championship, though the draw ruling prevented Summers from taking the title.
 Summers started with great speed and attacked fiercely while Stone clinched to avoid punishment.
 In the sixth, Stone rallied and got in some punishing body blows.
 After the eighth, Summer's pace slackened, and Stone blocked his leads more effectively.
 Many in the crowd believed that Stone had defeated Summers by a large margin, but may have been hampered by the bias of the hometown judges.

On December 13, 1913, Stone defeated Pal Brown, one of his most skilled opponents, at the Olympia Athletic Club in Sydney, Australia in a twenty-round points decision.
Stone wrote of Brown that "He was clever; his punches had a snap in them that hurt".
 Stone claimed to defeat Brown he had to dispense with his hopping tactic and keep both feet planted firmly on the ground.
Brown, an American from Minnesota, did well in Australia defeating the Australian lightweight champion Hughie Mehegan.

Abe "The Newsboy" Hollandersky, claimed to have sparred with Stone for a few rounds around 1911-14.
 Both were New York Jewish welterweights who worked as newsboys, frequented Tom Sharkey's bar and boxing studio, boxed over 200 bouts, and had a few of the same boxing opponents.
Stone delivered papers near Sharkey's in his youth, and boxed there a few times as well.
While still only twenty, Stone defeated the reigning 1912 BBofC and NSC British welterweight champion Johnny Summers on May 18, 1913 in a non-title twenty round points decision at Olympic Stadium in Brisbane, Australia.  Though less experienced and six years younger, he was considered by most reporters to have outpointed Summers in nearly every round. In September, Stone defeated Summers again in a twenty-round points decision in Sydney.  Stone later said of his second win against Summers, that he looked back on the fight as the "greatest of all his Sydney encounters".  Assessing Summers' skills, Stone wrote "He was a fighter with a world-wide reputation, and he had a wallop that would stop any clowning if he landed it, but his speed was not comparable to mine".  He later fought Summers to a twenty-round draw in Kensington, England on June 13, 1914 in a bout that was billed as a world welterweight championship, though the draw ruling prevented Summers from taking the title.  Summers started with great speed and attacked fiercely while Stone clinched to avoid punishment.  In the sixth, Stone rallied and got in some punishing body blows.  After the eighth, Summer's pace slackened, and Stone blocked his leads more effectively.  Many in the crowd believed that Stone had defeated Summers by a large margin, but may have been hampered by the bias of the hometown judges.
On December 13, 1913, Stone defeated Pal Brown, one of his most skilled opponents, at the Olympia Athletic Club in Sydney, Australia in a twenty-round points decision. Stone wrote of Brown that "He was clever; his punches had a snap in them that hurt".  Stone claimed to defeat Brown he had to dispense with his hopping tactic and keep both feet planted firmly on the ground. Brown, an American from Minnesota, did well in Australia defeating the Australian lightweight champion Hughie Mehegan.
Abe "The Newsboy" Hollandersky, claimed to have sparred with Stone for a few rounds around 1911-14.  Both were New York Jewish welterweights who worked as newsboys, frequented Tom Sharkey's bar and boxing studio, boxed over 200 bouts, and had a few of the same boxing opponents. Stone delivered papers near Sharkey's in his youth, and boxed there a few times as well.
Harry Stone (boxer)