FORMER Davis Cup ace Colin O'Brien held his nerve to edge a marathon three-setter and capture the men's singles title in the Wilson National Indoors Championships.
O'Brien and fellow Dubliner John Morrissey were deadlocked after 12 games in the deciding set at the David Lloyd Riverview.
But in the subsequent tie-break, Malahide left-hander O'Brien upped the tempo against the Stanford University tennis scholarship student and, after taking a 4-2 lead, he went on to land the Indoors honours for the first time on a 6-3 1-6 7-6 (7/2) scoreline.
In the third set, the first four games went against serve, and then at 4-4 Morrissey failed to convert a break point.
In his only previous Indoors final appearance, O'Brien, who was forced to quit the pro circuit in January 2011 due to an arm injury, lost to current national No 1 James McGee.
In the women's singles final, Donnybrook 18-year-old Jane Fennelly overcame Holly Monahan (17) from the Carrickmines club on a 6-2 7-6 (7/2) margin.
In Sunday's semi-finals, Fennelly avenged her defeat to Romanian-born Karola Bejenaru in the girls' singles final of the 2012 National Championship.