Warren Gatland faces a tough test in his first game in charge of Wales since returning as coach at the end of last year, as his side take on world number ones Ireland in Cardiff in the opening match of the 2023 Six Nations.
The man in the middle for the huge clash is Englishman Karl Dickson, a former player turned referee who has made the news in recent months following a number of high-profile incidents.
But who is Karl Dickson and what can Wales and Ireland expect from his officiating? We take a closer look:
