(CNN) -- Defending champion Roger Federer fought back from dropping the opening set to record his fourth Cincinnati Masters title with a 6-7 7-6 6-4 success over Mardy Fish on Sunday.
In a match dominated by serve, Federer claimed the only break deep in the final set to seal victory in two hours and 40 minutes.
A third tie-break seemed a certainty only for Fish to lose concentration and allow Federer a break point at 4-4 which he converted when the American netted a routine backhand.
The Swiss world number three -- who was securing his 63rd ATP career title but his first since the Australian Open in January -- now goes into next month's U.S. Open in fine fettle as he attempts to win a 17th grand slam crown.
The victory also enabled Federer to draw level with Bjorn Borg in joint fifth position in the list of Open era tournament wins.
Fish, who began the tournament down in 36th position in the world rankings despite recent titles in Newport and Atlanta, narrowly failed in his attempt to become the first unseeded player to win the event.
"It was a perfect match for both of us," Federer told reporters. "But only one can win it. Mardy played fantastic."