Which method is not acceptable for securing wrestling shoelaces?

Single-knotting is not an acceptable method for securing wrestling shoelaces because it does not provide a reliable or secure hold during the physical activity involved in wrestling. A single knot can easily come undone with movement, which poses a risk of tripping or losing a shoe during a match.

In contrast, double-knotting creates additional friction and security, helping to prevent the shoelaces from coming loose. Using tape can offer a temporary solution for securing shoelaces, although it may not be the most standard practice. Velcro straps, while not traditional for all wrestling shoes, can serve as a secure fastening method when designed specifically for athletic use. Thus, the critical issue with single-knotting is its insufficient security, making it the least favorable option for wrestlers.