Alfie Hewett beat compatriot Gordon Reid in straight sets to become the first Briton to win the men's singles title at the Wheelchair Tennis Masters.
Hewett, beaten by Reid in last year's Paralympic final, won 6-3 6-2 in one hour and 18 minutes in Loughborough.
The 19-year-old trailed 3-0 in the first set, but won eight straight games to take the opener and establish a lead he would hold on to in the second.
"It was probably one of the best matches I have played," said Hewett.
"Gordon is a great competitor. I am really proud of this win."
Hewett, who won the French Open in June, is second in the world rankings.
As a doubles pairing, Reid and Hewett have won two Wimbledon titles, the US Open and a Paralympic silver medal.
Reid, 26, said: "Alfie has had a brilliant week and played some class tennis.
"I have been part of the journey and watched him from 12 years old to here now. I am proud of what he has done in the sport."
Fellow Briton Andy Lapthorne lost 6-1 6-2 to American world number one David Wagner in the quad final.