Why the poet repeated the phrase Thud of leather on willow?

The repetition of the phrase "thud of leather on willow" serves to emphasize the sound's significance in the context of the poem, evoking the essence of cricket and the nostalgia associated with the sport. This auditory imagery creates a vivid atmosphere, allowing readers to connect emotionally with the experience of playing or watching cricket. Additionally, the repetition reinforces the rhythm and musicality of the poem, enhancing its overall impact and memorability.