Rusedski had previously won in Newport 11 years ago to claim the first of his 14 career titles. Sunday's final was his first since he won the Nottingham Open in June 2003.
Big-serving Rusedski, ranked 110th in the world before the tournament, spent months away from the tennis circuit fighting the doping allegations and had struggled to regain his form.
The 31-year-old was cleared of any doping offence after testing positive for the banned steroid nandrolone in July 2003.
A tribunal ruled the organisers of men's tennis, the ATP, were responsible for distributing tablets that appeared to be contaminated by prohibited substances.
On his return to action he suffered a first round loss at the French Open in May, went out of the Stella Artois championships at the same stage, failed to defend his Nottingham title, where he reached the quarter-finals, and was knocked out in the second round of Wimbledon.
