Canadian Leylah Annie Fernandez defended her title at the Monterrey Open.

The 19-year-old from Laval, Que., defeated Colombian Camila Osorio 6-7(5), 6-4, 7-6(3) on Sunday to win the tournament in Mexico for the second straight year.

This is the second WTA title of Fernandez’s career.

The Canadian lost the first set in a tiebreaker and fought back in the second. The lengthy third-set back and forth, in which play was suspended for 15 minutes due to a power outage at a crucial moment, saw Fernandez battle for five championship points before cruising in the tiebreaker.

WATCH l Fernandez overcomes power outage, 5 match points to win Monterrey Open:

The match lasted two hours and 52 minutes.

There were times in the third set where it barely looked like Fernandez could pull it off.

Fifth-placed Osorio broke Fernandez’s serve twice to start the final set and the Colombian quickly took a 4-1 lead. Fernandez broke Osorio in the seventh game to cut his opponents’ lead to 4-3 before leveling the match 4-4.

Trailing 5-4, Fernandez survived her first match point to force two, then tied the game again. The visibly puffed-up Canadian punched the air as the crowd roared.

When play resumed, Fernandez forced two points again, then sent the set to a tiebreaker, which she won 7-3. At championship point, Osorio fired a forehand wide and the Canadian threw both arms in the air in celebration.

Fernandez has won his last 10 games in Monterrey after also winning last year’s title.

The Canadian, a US Open runner-up last year, beat the Colombian twice in the 44-minute second set to force a third set with the championship on the line.

Fernandez was cruising at the start of the first set and appeared to be in complete control of the final. She won 12 of the first 16 points to lead 3-0 and then extended that lead to 5-3.

Serving for the first set, the 19-year-old was beaten by Osorio. She then dropped the tiebreaker.