the.com/walkover

means An easy, uncontested win — a contest decided not by effort but by the other side's absence or default.

from From horse racing in the early-to-mid 1800s: when only one horse was entered (or rivals withdrew), it still had to officially cover the course, so it simply 'walked over' the track at a stroll to claim the prize. The term later cantered into general use for any victory won without real contest.