"Marsaleks win at the Bank of England Sports Ground also makes him the first Briton to claim the title. Andy Murray was runner-up in 2004, a feat matched by Daniel Smethurst in 2008 and Martin Lee in 1996.
Marsalek, who trains at the adjacent National Tennis Centre said: "I didnt expect this coming here. To be honest I wasnt playing that well at the start of last week.
"But this is up there as the top thing that Ive achieved in tennis. It was tough, as I had to come from behind in the first set, but its great to get the win."