INDIAN WELLS, Calif. — As part of her morning routine, the Canadian teenager Bianca Andreescu finds a quiet place and visualizes success, big success.

“It’s crazy to think that it became a reality today,” she said after the roars had faded on Sunday afternoon.

Not so crazy if you observed all the shots and grit that Andreescu had to summon under duress to defeat tennis elder after tennis elder in the desert and win one of the most prestigious titles in the sport.

But it was certainly far-fetched when you considered her lack of experience at this level and the quality of the players she had to outhit and outwit, including the three-time Grand Slam champion and former No. 1 Angelique Kerber, 6-4, 3-6, 6-4, in Sunday’s final.