Jack White's early three-wicket burst put Yorkshire in control at the SSE SWALEC Stadium before Glamorgan mounted a fightback on day one. The Australian quick dismissed opener Asa Tribe, debutant Sean Dickson, and captain Kiran Carlson in quick succession, leaving the hosts reeling at 36-4.

Glamorgan's recovery was led by Kiran Carlson and Colin Ingram, who steadied the innings with a half-century partnership. Ingram's aggressive strokeplay included a six off Ryan van Beek, marking the first boundary of the season for the Welsh county. The innings was briefly interrupted when Jonny Bairstow required treatment for an injury scare.

Despite the late resistance, Yorkshire will be the happier side at stumps with Glamorgan 99-4. White's early dominance and Yorkshire's disciplined bowling attack set the tone for what promises to be a competitive County Championship encounter in Cardiff.