Roddick 137 miles per hour ace down the tee on set point would decide the set.
In the second set tiebreaker, the Canadian fought off three matchpoints before going ahead 12-11. A
Roddick crosscourt forehand pass which would land long evened the match at one set all.
Roddick, effectively using his own power serve and mixing in slice backhands took a 4-1 final set lead.
However soon afterwards Raonic would connect with a 150 miles per hour ace down the tee and followed by a crosscourt volley winner to even the set at 5 all.
Roddick serving, pulled ahead 6-5 behind a 115 miles per hour ace out wide on game point.
Serving to stay in the match at 30 all, Raonic netted a forehand to face his fifth and final matchpoint. A Roddick dive forehand pass handed the American the decisive break of serve.
“It was tough. I wasn‘t feeling my best today,” the 28 year old Roddick said.
“I said I was going to try to go out there today. I said I’m going to serve and try to slop together something. And that’s kind of what I did. The good thing about the match-up today was there were so many quick points with the serves that I thought I could. ”
The Canadian, only 20 years old, struck 32 aces in the final and 129 aces for the week, Monday move to a career high number 37 in the ATP Tour rankings.
“It was a difficult match. I don’t think either of us was playing great. But we just kept competing and doing what we could to try to win.”