A darts commentator has left viewers flabbergasted by revealing an X-rated remark by former world champion Martin Adams. The eye-opening revelation was made on the opening day of the WDF World Championship at the Lakeside as Vince Tipple was taking on Haruki Muramatsu.

In the first set, commentator Andrew Sinclair began talking about the perceived importance of averages before revealing Adams’ rather blunt views on the matter. Sinclair, a player himself, said: “We spoke about averages earlier. I remember a conversation with Mr Martin Adams, a legend on this stage, many years ago.

Opting not to clean up Adams’ choice of words, he continued: “To pardon my French, I was talking to him about averages, and he said, ‘Let me be frank, Andrew, son, averages aren’t worth a w***. So, I’ve tried to take that on board, particularly with regards to my own performances.”

The comment was broadcast live on the tournament’s YouTube stream. Adams’ opinion certainly carries some weight, as the now 69-year-old is a three-time BDO world champion, having won the Lakeside title in 2007, 2010 and 2011.

However, viewers were taken aback by Sinclair’s language, although many found it hilarious. One called it a “highlight” of the night, posting: “With most people (rightly) complaining about the horrendous camerawork ruining their enjoyment of the WDF World Championships, we were treated to one unexpected highlight. Step up, Andrew Sinclair.”

Another added: “Andrew Sinclair: Legendary darts commentary.” A third demanded: “Andrew Sinclair should be co-comms on all WDF comps. He’s good and knowledgeable and not shouty or irreverent or juvenile like some people/kids they use on streams.” Another joked: “He went full Partridge.” And a fifth quipped: “F****** hell, you don’t get that on Sky Sports.”

The tournament features 48 men, 24 women, eight boys and four girls competing for their respective titles, with an overall prize fund of £221,000. It’s a far cry from the PDC World Championship, where the prize fund has swelled to an incredible £5million, with £1million going to the winner.

Shane McGuirk is the defending men’s champion, having defeated Singapore legend Paul Lim 6-3 in last year’s final to claim his maiden Lakeside crown. Three-time women’s champion, Beau Greaves, is not defending her crown after opting to play at the PDC Worlds instead. Under PDC rules, players are not allowed to participate in both.