Ashley Theophane (46-8-1) won his 55th contest on March 23 in Kistarcsa, Budapest.
The 38-year-old Londoner defeated Hungary welterweight title contender Zsolt Friesz (7-6) via second-round stoppage to score his seventh straight victory since his last career defeat to Shoki Sakai (22-7) in August 2017.
Prince Patel (19-0-1) was also on the same bill, knocking his opponent Selemani Bangaiza (15-6) out within a minute of their scheduled eight-rounder.
The former British champion has won all his fights on foreign soil - all but one ending early, competing in six different countries over his last seven contests, and picking up the vacant German International (GBA) super-welterweight title in the process. Originally from London, 'Treasure' has been based in the States for the past seven years, having signed with Mayweather Promotions in 2012.
Three years ago, Theophane fought for the WBA world welterweight title against an overweight Adrien Broner in what was the the biggest fight of his career, but now he is looking forward to a long-awaited homecoming in the next few months.
The globetrotter said, "My next fight is in Dubai with Badou Jack Promotions. Then June 22nd with promoter Mickey Helliet at York Hall.
The last time I fought in London was when I defended my British title in 2011 at Wembley Arena."
Theophane, who is closing in on 50 career wins, reflected on his 16-year pro career, "I'm proud that I've fought and won in nine countries to date. Headlined in Las Vegas and been a member of Mayweather Promotions for five years.
"I've had an inspiring journey, from York Hall in London to the MGM Grand in Las Vegas."